Design and Measurement of 4 x 4 Millimeter Wave SIW Butler Matrix
Date Issued
2007
Date
2007
Author(s)
Chen, Chih-Jung
DOI
en-US
Abstract
In this dissertation, a 3 dB short-slot coupler, a 0 dB short-slot coupler and a 4 x 4 Butler matrix are fabricated on Rogers RO4003® substrate with 8 mil thickness. These circuits are operated at 30 GHz using substrate integrated waveguide (SIW). Though they are multiport devices, their multiport scattering matrices can be reconstructed using two-port measurement of vector network analyzer and thru-reflect-line calibration. For each device under test (DUT), the reconstructed scattering matrix on the one hand verifies its characteristics, and on the other hand is advantageous for the design of the follow-on applications.
With the aid of the HFSS® of Ansoft Corporation to visualize the field distributions, theory of the short-slot coupler is reviewed in Chapter 2. Explicit design formulas of 3 dB and 0 dB short-slot couplers are arranged to estimate the structure dimensions for the HFSS® simulations to begin with. According to the simulation results, SIW short-slot couplers of 0 dB and 3 dB and a 30 GHz 4 x 4 SIW Butler matrix are designed on Rogers RO4003® substrate with 8 mil thickness.
For the measurement of short-slot couplers, the measurement of fully symmetric four-port network using two-port vector network analyzer is discussed in Chapter 3 to reconstruct the four-port S-matrices of the 3 dB and 0 dB SIW short-slot couplers.
The concept of virtual auxiliary termination is introduced in Chapter 4 for the measurement of multiport DUT. The S-matrices of a Mini-Circuits® D17I 17 dB directional coupler, a DiTom® three-port circulator D3C2040 and a Narda® four-port circulator COF-2040 are then acquired accordingly from measurements using a two-port vector network analyzer and virtual auxiliary terminations.
Finally, a measurement procedure is developed in Chapter 5 to acquire the eight-port S-matrix of a 4 x 4 SIW Butler matrix by exploiting the concept of virtual auxiliary termination.
Subjects
毫米波
基板合成波導
微波量測
巴特勒矩陣
mm-wave
SIW
S-parameter
Butler matrix
Type
thesis
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