Design and Optimization of Stripline Passive Components With Trust-region Aggressive Space Mapping

2007 ◽  
Author(s):  
Wanchun Tang ◽  
Puke Zhou ◽  
Xuemei Chen ◽  
Y. Leonard Chow
Keyword(s):  
Trust Region ◽  
Space Mapping ◽  
Passive Components ◽  
Design And Optimization

scholarly journals Design and Optimization of Compact Printed Log-Periodic Dipole Array Antennas with Extended Low-Frequency Response

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2044
Author(s):  
Keyur K. Mistry ◽  
Pavlos I. Lazaridis ◽  
Zaharias D. Zaharis ◽  
Tian Hong Loh
Keyword(s):  
Frequency Response ◽  
Low Frequency ◽  
Trust Region ◽  
Size Reduction ◽  
Antenna Design ◽  
Baseline Model ◽  
Design And Optimization ◽  
Novel Technique ◽  
Array Antennas ◽  
Lower Frequencies

This paper initially presents an overview of different miniaturization techniques used for size reduction of printed log-periodic dipole array (PLPDA) antennas, and then continues by presenting a design of a conventional PLPDA design that operates from 0.7–8 GHz and achieves a realized gain of around 5.5 dBi in most of its bandwidth. This antenna design is then used as a baseline model to implement a novel technique to extend the low-frequency response. This is completed by replacing the longest straight dipole with a triangular-shaped dipole and by optimizing the four longest dipoles of the antenna using the Trust Region Framework algorithm in CST. The improved antenna with extended low-frequency response operates from 0.4 GHz to 8 GHz with a slightly reduced gain at the lower frequencies.

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