Compact circularly-polarized microstrip patch antenna on Reactive Impedance Substrates

A novel design of circular polarization microstrip patch antenna based on the complementary split ring resonator is evaluated numerically and experimentally verified. Unlike the previous application of its resonant performance, the non-resonant property of complementary split ring resonator is used as an asymmetric perturbation to excite the square microstrip patch antenna for a good circular polarization radiation. Good agreement is observed between the measurement and simulation results.

The shape of the radiating patch in the microstrip patch antenna is one of the many factors that affect the performance of the microstrip antenna.In this paper, on the premise of center frequency of 2.45 GHz, rectangular, circular and triangular microstrip patch antennas are designed and simulated respectively.The simulation results of the three microstrip patch antenna are analyzed, such as feed point position, return loss and radiation patterns.The influence of the shape of the radiation patch on the impedance bandwidth, gain and directivity of microstrip antennas is discussed.The simulation results show that the comprehensive performance of rectangular microstrip patch antenna is better than the other two, the comprehensive performance of triangular microstrip patch antenna is poor.

Fractal antennas have the characteristic of radiating in multiple frequencies through the property of self similarity that fractal shapes posses. By connecting fractal shaped antennas, wideband coverage can be achieved. Microstrip patch antennas with Sierpinski fractal geometry can be tuned, by design, to work exactly at the bands of interest, through judicious choice of the fractal designs and iteration. Therefore, a broadband dual-frequency microstip patch antenna with modified Sierpienski fractal geometry is designed by using Microwave Office 2002 simulation software. The broadband and multiple frequency characteristics of fractal antennas will be demonstrated. The performance of microstrip patch antenna with the classic and modified Sierpinski fractal geometries will be presented.

A double-band circularly polarized (CP) antenna for a novel radio-frequency identification (RFID) system using a wireless power transmission (WPT) technology is presented. Although the presented antenna is a thin lightweight circular microstrip patch antenna with one port, it radiates wide beam CP waves at two RFID frequency bands, 920 MHz and 2.45 GHz. Therefore, the antenna can be applied not only to a double-band RFID system but also a new RFID system being booted up by WPT energy.

5G is the creation of apprehending the total potential IoT. Since the request for 5G and Web of things, applications such as e-health, keen homes, e-learning, work from domestic, virtual conferences, and another gushing of online high-quality video substance is exponentially expanding day by day. The authors in this research have designed, compared and examined the execution of different Microstrip Antenna geometrical patches with and without metamaterial such as Circular Shape, Rhombus Shape, Square shape, Elliptical shape, and Triangular shape for 5G enabled IoT systems at 27 GHz, millimeter-Wave Band. In this research, authors have utilized Rogers RT/Duroid 5880 substrate with 50-ohm Microstrip Transmission line nourish. After Comparing and Examining the performance, authors have found square Patch Microstrip Antenna appears way better execution and exceedingly proficient than other shapes.

This paper presents a planar, low profile, high gain circularly polarized microstrip patch antenna array for millimeter-wave (mm-wave) wireless communication in Ka-band (26–40 GHz) applications. The single antenna element exhibits an impedance bandwidth (reflection coefficient < −10 dB) of 1.43 GHz (27.8-29.23 GHz) and an axial ratio (AR) bandwidth of 600 MHz (27.93–28.53 GHz). While designing the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1\times 4$</tex> antenna array, the geometry produces an impedance bandwidth of 1.74 GHz (27.79- 29.53 GHz) with an AR bandwidth of 350 MHz (28.75 −28.40 GHz). In addition, the array exhibits a large gain of 13.21 dBic as compared to 7.62 dBic gain of its single element. The proposed design has a compact size, simple topology, and broadside radiation. The concept is explained through parametric variation, current distribution, and radiation pattern.

This article presents a new design for a dual-band circular polarization microstrip patch antenna that can be used in unmanned aerial vehicle (UAV) applications. The proposed antenna consists of an etched circular shape on the radiator side of the antenna with multiple slots and stubs. The bottom side comprises a partial ground plane with multiple horizonal, vertical and square slots. These shapes on the front and bottom sides of the antenna are used to keep the resonant frequencies, impedance bandwidth and axial ratio (AR) at the desired values. The antenna operation is within the WiFi frequency bands, achieving maximum gains of 5.01 and 5.27 dBi at 2.4 and 5 GHz, respectively. Circular polarization (CP) is effectively realized through the implementation of opposite truncated corners and intentionally located stubs. The 3 dB axial ratio bandwidth (ARBW) is significantly enhanced, while a defected ground structure (DGS) is utilized to further improve the bandwidth and gain. The optimized antenna has overall dimensions of 40 × 40 × 1.6 mm3 and demonstrates a wide −10 dB reflection bandwidth of 5.38% (2.396–2.525 GHz) and 9.26% (4.91–5.38 GHz), along with a broad 3 dB axial ratio bandwidth (ARBW) of 380 MHz (2.29–2.67 GHz) and 80 MHz (5–5.08 GHz). The proposed antenna is fabricated using a low-cost FR-4 substrate with a dielectric constant of 4.4 and a loss tangent of 0.02. The fabricated antenna is experimentally characterized to verify the design concept as well as to validate the simulation results. It is found that the experimental measurements correlate very well with the simulation results. A comparison with comparable designs in the literature shows that the proposed antenna provides a higher gain with a relatively reduced size.

In this talk, a novel design concept to improve the bandwidth of a microstrip patch antenna (MPA) with low profile under multi-mode resonance of a single patch resonator is proposed. Based on the cavity model for a square MPA, the TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> and TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">30</sub> modes as well as both higher odd- and even-order modes between them are characterized. In order to combine the dual modes for wide-bandwidth radiation and stable radiation patterns, the differential-fed MPA with a SIR-typed radiating patch is employed firstly to reallocate the dual modes closely to each other. Then, the bandwidth, profile, dimensions, and sidelobe of the MPA under multi-mode resonance are improved through adding the shorting pins, introducing the shorting wall, and etching the narrow slots. As a result, a low-profile wideband MPA is realized with several attractive performance, such as decreased length, reduced sidelobe level, and stable radiation patterns. Finally, these proposed wide-bandwidth MPA under radiation of multi-resonant modes are proposed, designed, and fabricated to provide an experimental verification on the operating principle of the antenna.

Microstrip patch antenna (MPA) is widely implemented in different communication systems. One of the main disadvantages of MPA which limits its applications is its narrow bandwidth. In this paper I enhanced the bandwidth of MPA by inserting multiple slots in its ground plane. I used FR-4 substrate to design this antenna. The dimensions of this antenna are 59 mm and 79 mm. The dielectric constant is 4.4 and the height is 1.6 mm. I inserted up to 15 slots in ground plane with 1mm width. The spacing between slots is 3 mm. I investigated two designs. In the first design, slots were arranged in parallel to the feeding line. In the second one, slots were arranged horizontally to the feeding line. The main objective of this paper is to design and simulate MPA suitable for wide number of applications. Antenna bandwidth improvement is 18%. All the simulations were obtained by using HFSS simulator.

This paper presents a novel compact microstrip patch antenna for three-band application, consisting of a main straight arm and four spiral branches. This antenna is characterized by the very small size of only 0.191 /spl lambda/g by 0 212 /spl lambda/g at the first resonance frequency of 5.34 GHz, which represents a size reduction of 60% compared to a conventional rectangular microstrip patch antenna. The results indicate that the return loss is better than 10 dB and that the gain is about 6 dB in each band.

Role of di-electric materials as substrate for the performance of microstrip patch antenna: a review

In this paper, different shaped patch antenna and their array configurations have been designed and simulated by using advanced designed system (ADS) in order to improve the overall performance of microstrip patch antenna (MP A). FR4 dielectric material is used as substrate which has a dielectric constant of 4.4 and height of the dielectric substrste is 1 mm and loss tangent, tan δ is 0. Antennas are fed thruogh 50 Ω microstrip feed line. Each array consists of corresponding four single elements. Different antenna performance parameters like return loss, bandwidth, directivity, gain & radiation efficiency were analyzed for all the proposed antennas.

Performance analysis of microstrip patch antenna using a four-layered substrate of different materials

Over last few decades, wireless communication system has sought more attention and plays predominant role in different areas for human personal and commercial applications. Day by day, with advancements in technology, wireless gadgets got more compact due to microelectronics fabrication and integration techniques. So, such applications put great demand over new design specifications on antenna structures used in transmitter and receiver for radio wave communication. In wireless applications depending upon, frequency bands and bandwidth requirements numerous compact antenna structures are used with improved efficiency. Microstrip patch antennas are highly regarded due to its compact size, easy integration with microwave circuits. In study of patch antenna, Defected Ground structures gain popularity these days due to its various benefits to enhance antenna performance. This research article, provides extensive literature survey over use of Defected Ground Structures (DGS) in microstrip patch antenna with its design consequences. This article also explores the enhancement in antenna parameters with implementation of DGS’s. DGS concept is used in microstrip patch antenna and microwave engineering for performance improvement of these devices. DGS can be merged with other techniques to enhance antenna operational parameters like gain, bandwidth, VSWR and spurious radiations.

This paper focusses on comparison of the performance of Circular Microstrip Patch Antenna(CMPA) in S-band between CMPA with soil as substrate and CMPA with RT/Duroid 5880 as substrate. RT/Duroid 5880 is commonly used in the fabrication of Microstrip Patch Antennas (MPA) due to its low electrical loss, low dielectric loss, low moisture absorption etc. However, it is costly. This work tries to prove that soil substrate can be one of the contenders in the future to replace RT/Duroid 5880. The simulation is carried out in Computational Electromagnetic Software FEKO (suite 7.0). The paper concludes by stating that soil substrate being economical can be a potential candidate to replace RT/Duroid 5880 as there is very little to minimal change in key parameters such as bandwidth (a difference of 14.07 MHz), gain (a difference of 0.18 dBi) and directivity (a difference of 0.41 dBi) when the simulation results are compared.