Half mode substrate integrated waveguide cavity backed antenna with low cross-polarization

2018 ◽  
Author(s):  
Kundan Kumar ◽  
Shruti Priya ◽  
Santanu Dwari
Keyword(s):  
Substrate Integrated Waveguide ◽  
Cross Polarization

Substrate Integrated Waveguide-Based Periodic Backward-to-Forward Scanning Leaky-Wave Antenna With Low Cross-Polarization

2018 ◽  
Vol 66 (8) ◽  
pp. 3846-3856 ◽  
Author(s):  
Debabrata K. Karmokar ◽  
Y. Jay Guo ◽  
Pei-Yuan Qin ◽  
Shu-Lin Chen ◽  
Trevor S. Bird
Keyword(s):  
Substrate Integrated Waveguide ◽  
Cross Polarization ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna

Design and Experimental Validation of Miniaturized Self-Triplexing Antenna Employing HMSIW

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ayman A. Althuwayb
Keyword(s):  
Experimental Verification ◽  
Experimental Validation ◽  
Substrate Integrated Waveguide ◽  
Cross Polarization ◽  
Frequency Bands ◽  
High Isolation ◽  
Operating Band

Abstract The design and experimental verification of miniaturized cavity-backed self-triplexing antenna (STA) with high-isolation employing half-mode substrate integrated waveguide (HMSIW) are presented in this work. The proposed STA is constructed by using HMSIW, an Y-shaped slot and three 50Ω feed lines. Three unequal radiating patches are generated by engraving an Y-shaped slot on the top surface of the HMSIW cavity to operate at 3.7/5.0/5.8 GHz for WiMAX/WLAN applications. The proposed STA allows to realize one of the operating band independently by keeping other operating band unaltered and vice-versa. The circuit area of STA is highly miniaturized due to the use of HMSIW cavity and loading of Y-shaped slot. The isolations between three ports are greater than 31 dB. The fabricated STA provides 5.5, 5.92 and 5.93 dBi peak gains at 3.7, 5.0 and 5.8 GHz, respectively. The efficiency of the STA is greater than 92% at all the frequency bands. The constructed STA has a front-to-back ratio of more than 23 dB and a separation of more than 21 dB between co-to-cross polarization levels. Fabrication and measurement are used to validate the intended STA.

Ultra-compact self-diplexing antenna based on quarter-mode substrate integrated waveguide with high isolation

2021 ◽  
pp. 1-6
Author(s):  
Ayman A. Althuwayb
Keyword(s):  
Frequency Band ◽  
Long Term Evolution ◽  
Substrate Integrated Waveguide ◽  
Cross Polarization ◽  
Cavity Resonators ◽  
Frequency Bands ◽  
High Isolation ◽  
Term Evolution ◽  
Better Than

Abstract This article presents the design of an ultra-compact cavity-backed self-diplexing antenna with high isolation employing quarter-mode substrate integrated waveguide (QMSIW). The proposed antenna is constructed by using QMSIW, slot, and two 50Ω feed lines. Two eighth-mode cavity resonators are designed by inserting a slot on the top side of the rectangular substrate integrated waveguide to operate at 2.6 and 4.9 GHz for long-term evolution and public safety band applications, respectively. The proposed design allows to tune any frequency band independently by keeping other bands unaltered. The size of antenna is ultra-compact, due to the use of QMSIW cavity. The isolation between two ports is >35 dB. The antenna achieves 5.34 and 5.68 dBi peak gains at 2.6 and 4.9 GHz, respectively. The efficiency of the antenna is >85% at both frequency bands. The antenna provides more than 20.9 dB front-to-back-ratio and better than 21 dB separation between co-to-cross polarization levels. The designed antenna is validated through fabrication and measurement.

scholarly journals Analysis and Design of Cavity-Backed Probe-Fed Hybrid Microstrip Antennas on FR4 Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
D. C. Nascimento ◽  
Prêntice C. Ribeiro Filho ◽  
Alexis F. Tinoco-S ◽  
J. C. da S. Lacava
Keyword(s):  
Microstrip Antenna ◽  
Mutual Coupling ◽  
Low Cost ◽  
Microstrip Antennas ◽  
Substrate Integrated Waveguide ◽  
Cross Polarization ◽  
Analysis And Design ◽  
Linearly Polarized

A novel cavity-backed probe-fed linearly polarized microstrip antenna based on the concept of hybrid radiators is proposed and implemented. The resulting flush-mounted antenna exhibits symmetrical bandwidth, low cross-polarization radiation in theH-plane, due to its hybrid patch, and low cost, since it can be built on a FR4 laminate. Substrate integrated waveguide technology is used in the fabrication of the metallic cavity. The effect of mutual coupling is analyzed for two classical arrangements: the side-by-side and the collinear configurations.

Half mode substrate integrated waveguide based leaky wave antenna with low cross polarisation

Frequenz ◽  
2020 ◽  
Vol 74 (7-8) ◽  
pp. 239-245
Author(s):  
Pravesh Belwal ◽  
Rahul Agrawal ◽  
Suresh Chandra Gupta
Keyword(s):  
Longitudinal Axis ◽  
Forward Direction ◽  
Main Beam ◽  
Substrate Integrated Waveguide ◽  
Cross Polarization ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
The Cross ◽  
Polarization Level

AbstractA half mode substrate integrated waveguide (HMSIW) based leaky wave antenna (LWA) featuring low cross-polarization is proposed in this paper. The umbrella-shaped slot (the combination of longitudinal and transverse slots) is etched on the top layer of HMSIW LWA to get the efficient broadside radiation. The scanning range is obtained from −47° to +30° in a frequency range of 8.3 to 15.1 GHz. The cross-polarization level for the LWA is around −10 dB at broadside. In order to improve the cross-polarization levels in HMSIW LWA, two antennas are placed face to face obtaining the balanced symmetry across the longitudinal axis. Both the simulated and measured results show that the antenna is able to scan continuously from backward to forward direction with a very good low cross-polarization level. The developed prototype is capable of continuous beam scan from −29° to +32° in an operating frequency band of 9.2 to 15 GHz with a maximum gain of 13.5 dBi. The measured cross-polarization level is −30 dB which is quite low for the main beam at the broadside direction.

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