Microstrip patch antenna calculator. Microstrip patch antenna calculator; Antenna near field and far field distance calculator. Microstrip patch antenna calculator

 
 Microstrip patch antenna calculator; Antenna near field and far field distance calculatorMicrostrip patch antenna calculator  Use the frequency and layer thickness/Dk value to determine the antenna size

Fringing of the fields, particularly the electric field, at the edges of the patch is an issue of concern because of the finite dimensions involved. The simulated impedance bandwidth of about 219. GUI front end for rectangular patch antenna - "Microstrip Patch Antenna Design Calculator"(a) A rectangular patch microstrip antenna fed with a microstrip edge feed. In this paper, the design of a slotted rectangular microstrip patch antenna is reported which is suitable for high data rate application. The radiating elements and the feed lines tance in antenna designing application but there is a huge shortage of literature detailing the case specific dif-ferent methods for calculating the input impedance of microstrip antenna. 42MHz and 1598-1606MHz. 48. Find Microstrip Patch Antenna Calculator at CalcTown. Compared. Keywords: Circular Microstrip Patch Antenna Design. Any book for microstrip antennas should have the formulas you need to find the location of the feed point, to obtain precisely 50Ohm input impedance. It was hypothesized at the time that the increased impedance bandwidth was due to the existence of two resonances—that of the patch and that of the U-shaped slot. Firstly you had to determine target frequency and substrate material. 7 (13) 11. t is the Thickness of track (1 oz/ft2 = 0. Also Configuration of Antenna with Double split ring metamaterial superstrate has been shown in Fig. 264 0. 04/03/2007: Microstrip Patch Antenna: From Simulation to Realization added in the Tutorials\Tools section. 1 are symmetric and their radiation is easy to model. Effect of changes in basic. 1245,1251, Sep 1998. is cut. The overall bandwidth of the proposed antenna achieved 35% (4. [1] It is a kind of internal antenna. 4 GHz-2. The basic outline of the antenna is depicted in Figure 1, where W is the width, and L is the length (relative to the feed point) [7]. A patch antenna works by creating a field between a patch’s edges. Calculate the edge input impedance for the antenna. To determine the width (W), the microstrip patch antenna calculator was used to provide an initial starting point. Data safety. Since the operating bandwidth of the conventional design is extremely narrow, a metasurface is utilized for bandwidth. Pick out a standard part number from the data sheets listed below. 5 mm, and based on a ground plane as shown in Figure-1. For example: F=10. The Square patch feed by 50 coaxial probe is positioned 1. Microstrip Patch Antenna Calculator Calculate dimensions and edge impedance for desired resonant frequency. The microstrip patch antenna can also be designed using an artificial neural network (ANN) modeling technique where size of the antenna is major limitation especially in mobile and wireless applications. 2, the inner conductor of the coaxialA circular microstrip antenna is designed in order to obtain the required parameter responses from 2. In this paper, a novel microstrip patch antenna array based on a silicon-air photonic crystal substrate is designed and analyzed in the frequency range of 0. This paper proposes a design and fabrication of a floodlight-shaped microstrip patch antenna using flame-retardant (FR)-4 substrate within the frequency band of 1-6 GHz. The patch shapes in Figure 5. In telecommunication, a microstrip antenna (also known as a printed antenna) usually means an antenna fabricated using photolithographic techniques on a printed circuit board (PCB). The radiation of the patch is. An embedded microstrip is a microstrip transmission line or flat conductor separated from the ground place via a dielectric material. The proposed antenna shows that the dualband operation depends on gap between parasitic element, split-ring resonator, length and width of microstrip line. Cloverleaf antenna analysis and online calculator. 30021. This link is listed in our web site directory since Thursday Jul 9 2015, and till today "Microstrip Patch Antenna Calculator" has been followed for a total of. Enter the Wavelength, Number of Turns and the space between each coil to calculate the Antenna Gain, wire diameter, Half Power Beam Width, Beam Width First Nulls and Effective Apperature. The resonant frequency of an LC Circuit is the frequency at which the inductive reactance and capacitive reactance of the LC circuit are equal. 4. 4. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. Keywords-Microstrip patch antenna, return loss, feed line, finite element methods, method of moments and radiation loss. 2 and the loss tangent was 0. 1b. Tech Consultant Zach Peterson explores how to make patch antenna connections through the PCB substrate in order to avoid having traces on the same side of th. These antennas are used in a variety of applications including cellular telephones, military radios, and other communications devices. Analyze. The patch shapes in Figure 5. The input impedance of these antennas depends on their geometrical shape, dimensions, the physical properties of the materials involved, the feed type and location. Improving the gain performance of air substrate patch antenna array using the effect of conductive material thickness study for 5G applications. 14-5. Here are two spreadsheets on extra degrees of freedom for Adams' resistive splitter. The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists 20. The reactance reaches 0 Ohms at around 2. Where the dimensions of the patch along its length have been extended on each end by ∆L. The goal is to match the input impedance (Zin) to the transmission line (Z0). 89 mm. A 77 GHz series-fed. but I'm looking at something that has formulas and i want to calculate the width of the feed line not the square patch. Modeling approximation can be used to design the microstrip trace. This design helps to enhance gain and efficiency of microstrip patch antenna at resonance frequency. The antenna achieves dual-band operation by digging two concentric annular-ring slots on the ground. Microstrip patch antennas are widely used for wireless communication in MM wave applications [1]. Disadvantages include: Limited bandwidth (usually 1 to 5%, but much more is possible with increased complexity. Patch antenna is printed on FR4 material with. MPA calculator Structure of the proposed MPA with all values of measured dimensionsspecific types of microstrip antennas. 2,578. These two layers are separated by a ground plane with a slot, which provides coupling. The dimensions of antenna can be found in the HFSS simulation file. They hadlarge in intensity and extravagant because of the province. The rectangular patch antenna has a return loss of -40. In the RF domain the antenna size also has reduced and thus the system has become more portable. a) Dielectric loss (in dB per unit length, length is in the units used for λ. 6 GHz for UWB applications. The size of a microstrip antenna is inversely proportional to its frequency. 3. al. ; Kouloglou, A. 1,283. 3. Low power handling. By inputting values such as the operating frequency, substrate thickness, dielectric constant, patch height, and patch width, users can calculate the. 9, pp. Helical or Helix Antennas transmit a circular polarized wave. 186cm,substrate with height ℎ=0. The operation frequency of antenna is 15. The circular patch antenna is made using FR4, which is 4. Press Analyze to see the results. Long, "The dependence of the input impedance on feed position of probe and microstrip line-fed patch antennas," IEEE Transactions on in Antennas and Propagation. 04/02/2007: Ansoft Designer Planar EM Simulation of a microstrip transmission line added in the TutorialsTools section. . A novel periodic photonic crystal structure with through-holes drilled by a 4 × 7 array based on the line source analysis method was proposed in this paper to improve the gain and radiation of the microstrip antenna. A quarter wave transformer is used to match two transmission lines with different impedances. The main optimization goal is to reduce the maximum sidelobe level (SLL). The radiating elements and the feed linesImpedance Matching Techniques for Microstrip Patch Antenna Sonia Sharma1*, C. Center. Patch antenna with a quarter-wavelength matching section. 09. 70x 38. patch microstrip antennas," Antennas and Propagation, IEEE Transactions on, vol. The shape and size of patch determine the frequency of operation of the antenna and its performance. The dimensions of antenna can be found in the HFSS simulation file. This includes the remainder of the ground plane, the remainder of thePopular answers (1) Dear Medkour, The minimum size of the PCB is calculated with the following rule of thumb. 004). 6mm thick. As seen from figure 1. The proposed antenna resonates at 27. Use this tool to determine the the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or. The calculation refers to either a loaded 1/4 wave or a loaded dipole, Loop antenna resonant frequency calculator. The microstrip antenna is either fed with a microstrip line or cable. 2001, 49, 45–47. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. 5. It consists of rectangular substrate and the metal trace layer as shown in Fig. λ = Signal wavelength in meter (m) = c/f ( where f = signal frequency, C = speed of light = 2. Real Hams review new sites. . Microstrip patch antennas represent one family of compact antennas that offer a conformal nature and the capability of ready integration with communication system’s printed circuitry. 3. And does any one have the idea. 5 mils (241 microns). In this chapter, synthesis is defined as to obtain dimensions (W, L) of microstrip antenna while providing the resonant frequency (f r), height of the dielectric substrate (h), and dielectric constants at the input of the ANN model (). com, [email protected] mm high, and has a gain of 3 dB. 38 GHz. A circular microstrip patch antenna with L-slit is introduced at the right edge of the patch to reduce the resonant frequency. Microstrip Patch Antenna Calculator - This calculator calculates the length and width of a patch antenna based on the frequency, dielectric constant of the dielectric and the. Description. In this example, you create a 2x2 patch array on FR4, analyze the antenna, and generate Gerber files of the PCB for prototyping. Calculate the length, width, input impedance and resonant frequency of a microstrip patch antenna for a given substrate and physical parameters. Microstrip Line Calculator Analyze or synthesize a microstrip line based on substrate parameters and frequency. Panel antenna “Ellipse-patch 2х2” for 2100 MHz band. 5 GHz and calculate its resonant frequency. 244 GHz which gives the measure of the wideband characteristic of the patch antenna. Figure 2. This paper presents the design of a compact circular microstrip patch antenna for WLAN applications which covers the band 5. Does anyone have an idea about the wave port or lumped port in hfss ,which should be used especially for microstrip patch antenna in uwb range i. The values of air, in Figure 4, represent the distance in mm between. The MPA is a radiating patch on one. In this work, we have designed a Coplanar waveguide microstrip patch antenna with linear, upper and bottom and side slots for application in DSRC. 998 × 10 8) G = Antenna gain (Linear value) The effective antenna aperture can be calculated by the following formula when the gain of the antenna is specified in dB (decibels). Updated. 微带贴片天线 (或简称贴片天线). This calculator is essential for engineers,. 258 0. 3. In this work, the RMPA, CMPA and TMPA have been fabricated to operate at 28 GHz for the application in 5 G technology. Panel antenna “Double Ellipse-rectangle” for 3G/4G bands. 6mm thick FR-4 dielectric substrate with dimensions of 46. IEEE. Here you can find some references for microstrip patch antenna design. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. 1, 14. 26 GHz to 2. antenna. An individual microstrip antenna consists of a patch of metal foil of various. Their impedance bandwidth is typically 1–2%. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. This can be attributed to two factors: the resonant style of antenna (which makes the antenna radiate efficiently only over a narrow band of frequencies) and the thin thickness of antenna, typically less than 0. P B = Power output of Port 3. The antenna is fed by a 50 Ω microstrip line, and a quater wavelength transformer is used for the impedance matching. hi balanis antena theory book thay have give example problem. This paper provides details on how to investigate a new method of teaching microstrip patch antenna design made by Metamaterials using MATLAB by designing a friendly. 2017. The coaxial probe feed used . Tools. On GaAs (ε R =12. The easy calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from 12-18 AWG. The volume of the antenna is 75. 23 GHz. A Note on the Impedance Variation with Feed Position of a Rectangular Microstrip-Patch Antenna. The proposed design is created with the substrate with FR4 epoxy under dielectric constant 𝜀𝑟=4. Three-element vector of Cartesian coordinates in meters. bandwidth (BW) of a probe-fed microstrip patch antenna a on low permittivity (foam) substrate. For example, if you wish to input "25000000", just type "25M" instead. The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations. 6K Downloads. 57 GHz and 5. 2 permittivity and 1. Microstrip Patch Antenna Design Calculator 1 Mosin I Memon and 2 Prof. 45 - empirical coefficient mainly for open end effect. However, application specific patch shapes are often used to optimize certain aspects of MSA performance. 44 L5 5 W4 1However, in this paper, hexagonal microstrip patch antennas are designed and simulated for wireless backhaul at 3. Create the geometry of the Yagi-Uda antenna with two director elements of the length 131. The antenna factor describes the connection between the electric field intensity E around the antenna and the antenna's voltage output V. 25mm off-center. e 3. In this study the antenna was fed with a microstrip line. The designed antenna has inset feed over microstrip line feeding geometry. Product Categories; Custom Products. 827db and bandwidth of 308 MHz at the operating frequency, The VSWR obtained is 1. Microstrip patch antennas are used for communication purposes especially in military and civil applications. 12LNO/0. A microstrip patch antenna is comprised of a radiating metallic patch situated on one side of a nonconducting substrate panel with a metallic ground plane placed on the other side of the panel. Antenna gain is more typically listed in an antenna's specification sheet. 5: Online Microstrip Patch Antenna Calculator and Experimental Formulas . This calculator is essential for engineers, students, and researchers in the field of wireless communication. 0300. In the circular case, instead of the operating frequencies being related to rectangular resonances, they will be related to circular resonances defined by cylindrical Bessel functions. 1. The patch is generally made of conducting material such as copper and gold (Wikipedia, 2010). Microstrip Patch Antenna Calculator - This calculator calculates the length and width of a patch antenna based on the frequency, dielectric constant of the dielectric and the height of the thickness of the patch antenna substrate. The free-space directivity of a log-periodic dipole array (LPDA) is a function of its taper τ and its chosen spacing σ. The effectiveness of the proposed designs is confirmed through proper simulation results. The microstrip patch is designed so its pattern maximum is normal to. This calculator will help. MICROSTRIP PATCH ANTENNA OF RECTANGULAR DESIGN A Rectangular Microstrip Patch Antenna is designed to operate at 5. A stacked microstrip patch antenna with two parasitic patches, which is suitable for use in arrays and can be integrated with circuits, was proposed in [5]. 5(a), consist of a very thin (t ≡thickness) (t << λ 0, where λ 0 is the free-space wavelength) metallic strip (patch) placed a small fraction of a wavelength (h <<λ 0, usually 0. 03/10/2007: Online microstrip patch antenna calculator added in the TutorialsTools section. This is to demonstrate the design of a rectangular edge-fed microstrip patch antenna using HFSS @ 2. 05 GHz) with the average gain of 6 dBi. The Patch Antenna online calculator, which is based on simplified formulas for calculating microstrip transmission lines and is intended for preliminary calcula The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. The microstrip patch is feed by microstrip line trough slot in the common ground plane. The free space path loss is the loss in signal strength of a signal as it travels through free space. By understanding the microstrip transmission line, designers can. More than 100 million people. e. 8. This paper proposes a method for designing a 77 GHz series-fed patch array antenna. 3 and loss tangent of 0. 1 to 10. Microstrip patch antennas is one of the most used antennas for wireless communication. Thickness: Thickness of the microstrip conductor. path. 9, Iss. The thickness of the ground plane or of the microstrip is not critically important. For our microstrip patch antenna a = (W/2 + 2h) where 2h is the approximated width extension due to the fringing field , and η = 94%. Get Updates. The design theory of antenna is studied by various researchers and different types of geometry models are invented with respect to their knowledge and applications [2] [3] [4]. Microstrip Line Calculator Analyze or synthesize a. Read Microstrip Antenna Design Handbook_Ramesh Garg_2001',open Chap 4, sec. 1,312. Electromagnetic band gap (EBG) structure is. microstrip patch antenna, also fulfils all requirements for antennas used in satellite communication system. 5 is achieved. It is an Excel Calculator for a Microstrip Rectangular Patch Antenna. The microstrip antennas can be excited either by coaxialThe patch antenna calculator linkMicrostrip line calculator linksubstrate used: Er. 825 GHz. 2. ” In The Antenna Toolbox™ library of antenna elements includes a patch antenna model that is driven with a coaxial probe. The Transmission Line model method. 8 0. This is based on the height, dielectric. The patch antenna calculator calculates length and width as outputs and requires inputs such as RF center frequency, dielectric constant and height of substrate. The microstrip. Equation 11. 6 mm. In this article, we will discuss the antenna design and performance. Many modal waves are excited. Two points in space, specified as a 2-by-3 matrix corresponding to two three-element vectors of Cartesian. First the model of the microstrip patch antenna has to be drawn in HFSS. Figure 1a shows configuration of microstrip antenna with S coupled metamaterial superstrate. They develped a 1x2 microstrip patch antenna array based on photonic crystals. insetpatch = patchMicrostripInsetfed creates an inset-fed microstrip patch antenna centered at the origin. You can use this online calculator to find the approximate values. Understanding the Antenna Near Field & Far Field Distances. Cite. Index Terms-Microstrip patch antenna, MATLAB calculator, CST, 2. 285 mm × 7. In the place of. 微带贴片天线计算器. This example uses a Yagi-Uda antenna with the same dimensions as given in . A schematic diagram of microstrip patch antenna. The design of this work gives the following results; return loss of -34. The feed line is given in lower substrate and the coupling between patch and feed is made through the slot (or) aperture in the ground plane. 2 answers. COAXIAL FEED TO MICROSTRIP ANTENNAS Patch size =8. Microstrip is a single trace on the top layer, with no ground close to it on the same layer. Track Thickness: mm. Easy to form a large array, spaced at half-wavelength or less. 000+ links organized into 600+ categories. This paper presents a bi-port, single-layered (planar), dual circularly polarized (CP) patch antenna with improved interport isolation for S-band satellite telemetry and telecommand applications. Patch antenna with Slits and Slots With the help of slot size of microstrip patch antenna is reduced as shown in Figure 7 [17]. Result: Free Space Path Loss (FSPL) calculations are often used to help predict RF signal strength in an antenna system. However, microstrip antennas have several disadvantages, including a limited bandwidth of operation, low gain, and surface-wave losses. This effect can be done by changing the path of current. Figure- 1. , the patch is treated as a wide piece of a microstrip line. microstrip-antenna-calculator A microstrip patch antenna calculator Brought to you by: hilmi. 25mm. This paper review the different meth - ods used to calculate the input impedance of microstrip patch antenna along with different impedance match-ing techniques. The patch may be in a variety of shapes, but rectangular and circular are the most common. The antenna is designed withcircularly polarized antenna based on a circular microstrip patch. A patch antenna, depicted in Figure 1. PLAY ANYWAY. 4. The feeding method is a microstrip line feed. When slots are cut into patch, current is changed. Batwing antenna - super wideband bat wings for 3G/4G. Where L is the length of the dipoles. Universal 3G/4G/Wi-Fi MIMO feed for. 528 L4 9 WG 18. 25 shows the schematic design of a rectangular microstrip patch antenna. 6 mm 3 which is highly compact sized antenna. It should be less than -10 dB for the acceptable operation. It also provides formulas, equations, and applications of this popular microwave antenna. This means that on each side of the feed line there should be a distance of 1/2 the microstrip width on each side of the microstrip between the microstrip feed line and the patch antenna. In some cases, users require a custom impedance value. Microstrip patch antennas gains an advantage over other microwave antennas in the area of portability as these antennas. Enter the resonant frequency or the substrate parameters and get the results for the microstrip patch antenna. The patch cutout for the feed inset should be > 2 times the microstrip width. Feeding Methods 2. Download microstrip patch antenna calculator. Commonly fabricated with printed circuit board (PCB) technology, a microstrip antenna calculator tool is an electrical transmission line that is. 2 and with 40 mm×46 mm dimensions and height 1. Accessed from This Thesis is brought to you for free and open access by RIT Scholar Works. The design is fabricated on the dielectric substrate FR4, which has the dielectric permittivity constant of the substrate (ɛr) = 4. The microstrip antenna, Part 2: Implementation. 1. The results obtain that microstrip patch antenna can be used as client antenna in computer and workable antenna for wireless fidelity. The effect of the air gap distance on the gain of the dual layer microstrip patch antenna at the desired frequency is shown in Figure 4. It also has a wide angle of beam in its radiation pattern. This antenna is fed using probe feed model. Microstrip patch antenna with air gap [16] f. . Advanced Circularly Polarised Microstrip Patch Antennas Adam Z. FR-4 substrate with dimensions of 10x20x1. Press Analyze to see the results. 2 Coaxial Feed (Coplanar Feed) 2. The length of the dipole is usually one-half of the wavelength of the RF signals. 6mm thick. microstrip antenna patch calc. patch antenna calculator it might be regarded as two capacitors in parallel . Step 2: Calculation of the Effective Dielectric Constant. Solution freq. When the antenna is excited, the waves generated within the di-electric undergo reflections and the energyis radiated from the edges of the metal patch,which is very low. Parametric analysis and design of 28GHz microstrip patch antenna. Microstrip patch antenna is used in mobile handset due to simple look, lower cost, small size and light in weight. The substrate parameters. 45 GHz) and 5G band (3. As an example, the size must increase to have it work at lower frequencies. kocha Member level 1. 0 mm. A simulation of sixteen (hexadeci) faced microstrip patch antenna design using slit on the edge is discussed here. In this research, a microstrip patch antenna design operating at 10 GHz frequency was carried out. Compared to waveguides, microstrip is generally has a lower power handling capacity, and higher losses due to the fact that it is not enclosed. f 0 is resonant frequency in GHz for the current design. 1. A simple tool to calculate parameters for an edge fed/inset fed/probe fed patch antenna or microstrip antenna. Enter the resonant frequency or the substrate parameters and get the. Many modal waves are excited. patch microstrip antennas," Antennas and Propagation, IEEE Transactions on, vol. 3. Microstrip patch antenna calculator; Antenna near field and far field distance calculator. The width of the conducting layer is important to calculate the radiation intensity since it directly affects. with formulas, which were first derived for microstrip transmission lines, i. 913–922 914 & The Institution of Engineering and Technology 2015the values of the proposed microstrip antenna . 72 THz in order to improve its performance by suppressing undesirable surface waves that are found in the homogeneous substrate. 2. First the model of the microstrip patch antenna has to be drawn in HFSS. The operational characteristics are in the range of 2. 1). November 2023 ∴ Live And Learn. If the feed is located closer to the edge of the patch the input impedance will be high, if the feed is located closer to the center of the patch the impedance will be low. The antenna is fed by a microstrip line with 50 Ω characteristic impedance and. 5 mm, respectively. For more information visit my blogThis paper presents a high-band microstrip antenna of dimension (5 × 5 × 1) mm 3 for 5G wireless mobile communications ranging up to 40–45 GHz. Note that the "h", for dielectric thickness in this formula is omitted in some other Polar publications. 1 to 10. Together, with the increasing number of its users is the continuation of developing the method for more applications. 04/02/2007: Ansoft Designer Planar EM Simulation of a microstrip transmission line added in the TutorialsTools section. The patch may be square, rectangular, circular, triangle and elliptical but the most commonly used microstrip patch antenna is the rectangular microstrip patch antenna [1]. Light weight. 4GHz Substrate- FR4 Epoxy With reference to the fig, I need the value of W and the feed lengthTwo known methods of controlling the input impedance of a microstrip end-fed patch antenna are investigated and their results are compared. **Note: Like our stripline impedance calculator, all of our RF calculators allow SI prefix input. The substrate parameters (ε r and h) are required. Following equations or formula are used for this microstrip patch antenna calculator. 0. GitHub is where people build software. When playing, some cookies are set and your privacy is futschikato. Use the above equation to calculate the x-coordinate for the probe location. Share this resource Share this link with your friends, publish within popular social networks or send it via email. Helical or Helix Antennas transmit a circular polarized wave. The original source of formula is IPC-2141: Controlled Impedance Circuit Boards and High-Speed Logic Design, April 1996. In this design the substrate RT Duroid was used due to its advantages. 45/5-GHz WLAN bands with novel harmonics suppression and high gain properties is presented in this paper. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. 8 × 107 S⁄m) with a thickness of 7 µm is used to make the ground and antenna patch. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. 6mm) on the Roger RT/duroid substrate. patch antenna is based on low-cost, but lossy, and the substrate is made of Rogers RT 5880 (lossy). The patch antenna, microstrip transmission line and ground plane are made of high conductivity metal (typically copper). 2 Design Specifications Before designing the antenna, the first step is to consider the specification of the antenna base on it application. Physical and effective lengths of Rectangular Microstrip patch. C.