scholarly journals Periodic Microstrip Leaky Wave Antenna with Double-Sided Shorting Pins and Pairs of Slots

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Yahuan Chen ◽  
Kuang Wang ◽  
Yuanxin Li ◽  
Yunliang Long
Keyword(s):  
Radiation Pattern ◽  
Structural Parameters ◽  
Ground Plane ◽  
Stop Band ◽  
Leaky Wave ◽  
Rectangular Patch ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Shorting Pin ◽  
Frequency Changes

A backward to forward scanning periodic microstrip leaky wave antenna (MLWA) is presented. The proposed antenna consists of a long rectangular patch with alternating shorting pin on each side, which connects the antenna patch and the ground plane to form periodic shorting circuits. There are two pairs of slots alternately spaced on the long patch to suppress the open stop band (OSB). The OSB problem was initially reduced by optimizing the structural parameters, and the slotting on the patch further improved it. The measured radiation pattern in the y-z plane shows that the antenna can scan electronically from 142° to 39° toward the end-fire (+z direction) when the operating frequency changes from 6 GHz to 12.9 GHz. The measured gain is greater than 5 dBi over the entire operating band.

scholarly journals A New Kind of Circular Polarization Leaky-Wave Antenna Based on Substrate Integrated Waveguide

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chong Zhang ◽  
Junhong Wang ◽  
Meie Chen ◽  
Zhan Zhang ◽  
Zheng Li
Keyword(s):  
Circular Polarization ◽  
Radiation Pattern ◽  
Structural Parameters ◽  
Axial Ratio ◽  
Polarization Property ◽  
Substrate Integrated Waveguide ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna

A new kind of circular polarization leaky-wave antenna with N-shaped slots cut in the upper side of substrate integrated waveguide (SIW) is investigated and presented. The radiation pattern and polarization axial ratio of the leaky-wave antenna are studied. The results show that the width of N-shaped slots has significant effect on the circular polarization property of the antenna. By properly choosing structural parameters, the SIW based leaky-wave antenna can realize circular polarization with excellent axial ratio in 8 GHz satellite band.

New approach for computing radiation pattern of dielectric leaky-wave antenna

1989 ◽  
Vol 25 (5) ◽  
pp. 345 ◽  
Author(s):  
M. Ghomi ◽  
H. Baudrand ◽  
C. Cavalli
Keyword(s):  
Radiation Pattern ◽  
Leaky Wave ◽  
New Approach ◽  
Leaky Wave Antenna ◽  
Wave Antenna

Design and Analysis of Full and Half Mode Substrate Integrated Waveguide Planar Leaky Wave Antenna with Continuous Beam Scanning in X-Ku Band

Frequenz ◽  
2019 ◽  
Vol 73 (5-6) ◽  
pp. 171-178 ◽  
Author(s):  
Ved Prakash ◽  
Sunita Kumawat ◽  
Priti Singh
Keyword(s):  
Characteristic Impedance ◽  
Substrate Integrated Waveguide ◽  
Continuous Beam ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Paper Substrate ◽  
Maximum Gain ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Frequency Changes

AbstractIn this paper, substrate-integrated waveguide (SIW) and half mode substrate integrated waveguide (HM-SIW) periodic leaky wave antennas (LWAs) are presented for the antenna applications. The continuous beam scanning (CBS) is realized by optimizing the unit cell by matching its impedance to the characteristic impedance of the waveguide. This leaky wave antenna is capable of total 60 ° scanning from −38 ° to + 22 ° as the frequency changes from 10.17 GHz to 16.3 GHz with a maximum gain of 11 dBi. Moreover, for further miniaturization, HM-SIW technology is employed in the presented LWA. This LWA is also capable of CBS from −50 ° to + 26 ° in the frequency band of 10 GHz to 16.5 GHz with a maximum gain of 12 dBi. The final prototypes of the both these antenna are fabricated and measured results are in agreement with the simulated ones.

Microstrip Line Fed Leaky Wave Antenna with Shorting Vias for Wideband Systems

2016 ◽  
Vol 6 (4) ◽  
pp. 1725 ◽  
Author(s):  
T V Rama Krishna ◽  
B T P Madhav ◽  
G Monica ◽  
V Janakiram ◽  
S Md Abid Basha
Keyword(s):  
Propagation Constant ◽  
Stop Band ◽  
Wave Structure ◽  
Travelling Wave ◽  
Strip Line ◽  
Defected Ground Structure ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Conducting Path

In this work a complex structured shorted vias microstrip leaky wave antenna is designed and analysed. A Leaky wave antenna is a travelling wave structure with complex propagation constant. When shorting vias are loaded in a periodic structure the fundamental resonant mode shows some stop band characteristics and some of the modes will strongly attenuated. Three different types of iterations are examined in this work with and without defected ground structures. The defected ground structure based leaky wave antennas are showing better performance characteristics with respect to efficiency and phase. A micro strip line feeding with impedance of 50 ohms at both ports are providing excellent impedance matching to the conducting path on the microstrip surface. The shorting vias are suppressing certain higher order frequency bands and providing excellent wide band characteristics with low loss.

scholarly journals Analysis and Design of Leaky-Wave Antenna with Low SLL Based on Half-Mode SIW Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Jiaying Guo ◽  
Zheng Li ◽  
Junhong Wang ◽  
Meie Chen ◽  
Zhan Zhang
Keyword(s):  
Structural Parameters ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Leaky Wave ◽  
Antenna Aperture ◽  
Antenna Structure ◽  
Analysis And Design ◽  
Leaky Wave Antenna ◽  
Radiated Power ◽  
Wave Antenna

This paper presents a novel leaky-wave antenna based on the Half-Mode Substrate Integrated Waveguide (HMSIW) structure with low side lobe level. The effect of the structural parameters of the LWAs on the radiation performances is studied. Using beam-forming technique, the leakage loss factorαalong the radiation aperture is designed in a tapered way by controlling the aperture depth along the structure. This controls the radiated power along the antenna aperture and finally achieves the radiation pattern with low SLL. Furthermore, the antenna structure is optimized to get an even lower SLL.

scholarly journals Microstrip Line Fed Leaky Wave Antenna with Shorting Vias for Wideband Systems

2016 ◽  
Vol 6 (4) ◽  
pp. 1725
Author(s):  
T V Rama Krishna ◽  
B T P Madhav ◽  
G Monica ◽  
V Janakiram ◽  
S Md Abid Basha
Keyword(s):  
Propagation Constant ◽  
Stop Band ◽  
Wave Structure ◽  
Travelling Wave ◽  
Strip Line ◽  
Defected Ground Structure ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Conducting Path

In this work a complex structured shorted vias microstrip leaky wave antenna is designed and analysed. A Leaky wave antenna is a travelling wave structure with complex propagation constant. When shorting vias are loaded in a periodic structure the fundamental resonant mode shows some stop band characteristics and some of the modes will strongly attenuated. Three different types of iterations are examined in this work with and without defected ground structures. The defected ground structure based leaky wave antennas are showing better performance characteristics with respect to efficiency and phase. A micro strip line feeding with impedance of 50 ohms at both ports are providing excellent impedance matching to the conducting path on the microstrip surface. The shorting vias are suppressing certain higher order frequency bands and providing excellent wide band characteristics with low loss.

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