Stop-Band Radiation Properties of Higher-Order Space Harmonics-Enabled Broadside Multi-Beam Leaky-Wave Antenna

2021 ◽  
Author(s):  
Mohammad Reza Rahimi ◽  
Mohammad S. Sharawi ◽  
Ke Wu
Keyword(s):  
Stop Band ◽  
Higher Order ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Radiation Properties ◽  
Space Harmonics

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.

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 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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