Effective Approach to Reduce Variation of Quasi-E-Plane Beamwidth of EH1-Mode Microstrip Leaky-Wave Antennas

This letter presents an effective approach to reduce the quasi-E-plane beamwidth variation of EH1-mode microstrip leaky-wave antennas (MLWAs) as main beam scans from broadside to endfire. Theoretical equivalent modeling of quasi-E-plane radiation patterns of EH1-mode MLWAs is developed first, which...

Full description

Saved in:
Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2018-09, Vol.17 (9), p.1732-1735
Main Authors: Xie, Danpeng, Zhu, Lei
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Apertures
Computer simulation
Constant beamwidth
Cutoff frequency
Equivalence
Feature extraction
Leaky wave antennas
Leaky waves
Mathematical models
Microstrip antennas
microstrip leaky-wave antenna (MLWA)
Model accuracy
pin-loaded technique
quasi-E plane
Strips
Tuning
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This letter presents an effective approach to reduce the quasi-E-plane beamwidth variation of EH1-mode microstrip leaky-wave antennas (MLWAs) as main beam scans from broadside to endfire. Theoretical equivalent modeling of quasi-E-plane radiation patterns of EH1-mode MLWAs is developed first, which intrinsically figures out two key factors that could effectively ameliorate the lateral beamwidth variation, i.e., enlarged strip width and increased operating frequency. Then, the unique pin-loaded technique is employed to realize of the above requisites, and full-wave numerical extraction is conducted to thoroughly reveal the pin-loaded features of flexibly enlarged lateral strip width. One set of analyzed parameters are selected for implementation of the proposed pin-loaded EH 1-mode MLWAs. And, a differentially driven antenna prototype is finally designed, fabricated, and tested. Both simulated and measured half-power beamwidths are in good accordance with the theoretical one, not only verifying the accuracy of the equivalent modeling but also validating our proposed approach to suppress the beamwidth variation during beam scanning.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2864962