Design of microstrip patch antenna using Half-Mode Substrate Integrated Waveguide feeding technique
01 Dec 2015-pp 1-2
TL;DR: In this paper, a microstrip patch antenna fed by halfmode substrate integrated waveguide (HMSIW) is presented, which is placed at an inset in the open end of the HMSIW separated by a narrow slot.
Abstract: In this paper, the design of microstrip patch antenna fed by Halfmode Substrate Integrated Waveguide (HMSIW) is presented. The proposed microstrip patch antenna is placed at an inset in the open end of the HMSIW separated by a narrow slot. The HMSIW is excited to generate dominant TE10HM mode. The amount of inset of the patch in the HMSIW helps to get impedance matching and as a result, the incident wave couples easily from HMSIW to patch antenna. The proposed antenna resonates at 10.5 GHz with the bandwidth of 500 MHz (4.76%) and cross polarization level lower than −21dB.
Citations
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TL;DR: In this paper, a novel IMSL tunable phase shifter for HMSIW-LWA-fed rectangular patches based on liquid crystal technology is proposed, where Rectangular patches are used as radiators for the opening sidewall of the waveguide and matched section part for a unit cell.
Abstract: A novel IMSL tunable phase shifter for HMSIW-LWA-fed rectangular patches based on liquid crystal technology is proposed. Rectangular patches are used as radiators for the opening sidewall of the waveguide and matched section part for a unit cell. The transition structure is added for enhancing the efficiency of HMSIW-LWA due to converting most input power to the leaky mode. The novel IMSL phase shifter is used for investigating the tunable dielectric characteristics of N-LC by applying an electric field to the LC cell, which is controlled by the orientation angle of the LC molecules. Theoretically, the orientation angle is derived and solved numerically with the accurate method. As a result, the HMSIW-LWA can be tuned up to ± 25° for a fixed frequency by tuning the nematic LC with applied voltage from 0 to 20 V. In addition, the realized gain changed from 6 to 9.4 dB for a fixed tuned frequency, and 46° steerable for rest main beams range of the HMSIW-LWA in both forward and backward directions.
5 citations
01 Jun 2016
TL;DR: The Half-Mode Substrate Integrated Waveguide (HMSIW) fed dual frequency microstrip patch antenna has been presented and is excited to generate dominant TE10HM mode.
Abstract: In this paper, the design of Half-Mode Substrate Integrated Waveguide (HMSIW) fed dual frequency microstrip patch antenna has been presented. The proposed antenna is designed using two microstrip patches such that it resonates at two frequencies 9.95 GHz and 11.35 GHz which are used for X-band applications. The HMSIW is excited to generate dominant TE 10 HM mode. Two patches are used as a radiating elements fed by the open end of HMSIW. The bandwidth at 9.95 GHz is 320 MHz (3.22%) with the return loss of −20 dB and the bandwidth at 11.35 GHz is 580 MHz (5.16%) with the return loss of −30 dB have been achieved.
5 citations
Cites methods from "Design of microstrip patch antenna ..."
...Design of Microstrip patch antenna using HMSIW feeding technique has been presented in [5] for single frequency at X-band....
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References
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TL;DR: In this article, the propagation properties of the halfmode substrate integrated waveguide (HMSIW) were studied theoretically and experimentally in the frequency range of 20-60 GHz.
Abstract: The propagation properties of the half-mode substrate integrated waveguide (HMSIW) are studied theoretically and experimentally in this paper. Two equivalent models of the HMSIW are introduced. With the first model, equations are derived to approximate the field distribution inside and outside the HMSIW. Using the second model, an approximate closed-form expression is deduced for calculating the equivalent width of an HMSIW that takes into account the effect of the fringing fields. The obtained design formulas are validated by simulations and experiments. Furthermore, the attenuation characteristics of the HMSIW are studied using the multiline method in the frequency range of 20-60 GHz. A numerical investigation is carried out to distinguish between the contributions of the conductive, dielectric, and radiation losses. As a validation, the measured attenuation constant of a fabricated HMSIW prototype is presented and compared with that of a microstrip (MS) line and a substrate integrated waveguide (SIW). The SIW is designed with the same cutoff frequency and fabricated on the same substrate as the HMSIW. The experimental results show that the HMSIW can be less lossy than the MS line and the SIW at frequencies above 40 GHz.
342 citations
TL;DR: In this paper, a half-mode substrate integrated waveguide (HMSIW) is used to construct a transverse slot array antenna for X-band and Ka-band applications.
Abstract: Transverse slot array antennas fed by a half-mode substrate integrated waveguide (HMSIW) are proposed and developed in this paper. The design concept of these new radiating structures is based on the study of the field distribution and phase constant along the HMSIW as well as on the resonant characteristics of a single slot etched on its top conducting wall. Two types of HMSIW-fed slot array antennas, operating, respectively, in X-band and Ka-band, are designed following a procedure similar to the design of slot array antennas fed by a dielectric-filled rectangular waveguide. Compared with slot array antennas fed by a conventional rectangular waveguide, such proposed HMSIW-fed slot array antennas possess the advantages of low profile, compact size, low cost, and easy integration with other microwave and millimeter wave planar circuits. It is worth noting that the width of HMSIW slot array antennas is reduced by nearly half compared to that of slot array antennas fed by a substrate integrated waveguide.
86 citations
"Design of microstrip patch antenna ..." refers background in this paper
...Design of HMSIW Slot array antennas is presented in [4]....
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TL;DR: In this article, two low-profile hybrid antennas are presented, one providing linearly polarized (LP) wave and the other one producing circularly polarized (CP) radiated field.
Abstract: Two low-profile hybrid antennas are presented. One of the structures provides linearly polarized (LP) wave and the other one produces circularly polarized (CP) radiated field. half-mode substrate integrated waveguide (HMSIW) technique is used to make a semi-circular cavity for reducing the antenna size. Using proximity effect, TM010 mode of a rectangular patch is excited by the HMSIW cavity. An inset microstrip line is used to excite the structure which leads to capability of planar circuit integration. The effects of the HMSIW cavity-backed antenna with and without patches are investigated. The simulated results show that adding the patch increases bandwidth and improves antenna gain. Both proposed hybrid antennas are made on a single-layer substrate using printed circuit board (PCB) process. Two prototypes of the proposed antennas are designed, simulated and fabricated. It is shown that broadband impedance bandwidth of 10% and maximum gain of 7.5 dBi is obtained for the LP antenna. In the case of CP antenna, axial ratio (AR) bandwidth is at least 1% with maximum gain of 6.8 dBi. The proposed hybrid antennas are low profile and offer attractive features such as high gain, low cross polarization level and high front-to-back ratio.
77 citations
TL;DR: In this paper, a set of substrate-integrated cavity-backed patch antennas of alternative topologies is proposed using the substrateintegrated waveguide (SIW) technology, where the cavity backing the patch is emulated using array of plated through via holes.
Abstract: A set of substrate-integrated cavity-backed patch antennas of alternative topologies is proposed. Using the substrate-integrated waveguide (SIW) technology, the cavity backing the patch is emulated using array of plated through via holes. The proposed topologies have the potential to widen the inherent limited bandwidth of the conventional patch from typically 2% to about 15% depending on the height of the backing cavity. Additionally, the cavity enhances the antenna gain by about 2 dB, as the cavity is very effective in suppressing the unwanted surface waves, thus improving the radiation efficiency. Meanwhile, the proposed SIW topology has a low fabrication cost, as the whole structure could be attained using conventional printed circuit board processing. Design parameters of the SIW cavities are thoroughly investigated in this study, demonstrating their leakage characteristics. Four different structures are investigated corresponding to the different combinations of rectangular or circular patches backed by rectangular or circular SIW cavities. Detailed design guidelines are presented for the SIW cavities to ensure minimum leakage losses and for the radiating elements to achieve a desired fractional bandwidth. Based on experimental prototypes, a thorough comparative study between the four different topologies is presented demonstrating the attractive characteristics of each topology as far as gain, bandwidth, cross-pol level and mutual coupling.
45 citations
"Design of microstrip patch antenna ..." refers background or methods in this paper
...SIW cavity backed patch antennas are presented in [2] using coaxial feeding but it does not have proper design equations....
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...Multilayer patch antenna fed by SIW is presented in [2]....
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17 Oct 2011
TL;DR: In this article, a microstrip patch antenna fed by a Substrate Integrated Waveguide (SIW) is presented, which operates in the centimeter-wave band at 9 GHz frequency.
Abstract: A microstrip patch antenna fed by Substrate Integrated Waveguide (SIW) is presented in this paper. The antenna operates in centimeter-waveband, at 9 GHz frequency. In the first step, the antenna is modeled in Ansoft HFSS. Influence of the most important parameters on the return loss of the antenna is investigated. In the second step, the final model of the antenna is simulated, fabricated and measured. At the operating frequency, the antenna reaches 8.8% impedance bandwidth (for s 11 better than −10 dB) and 8.2 dBi gain.
18 citations