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NOVEL
MICROSTRIP DISTRIBUTED RF MEMS PHASE SHIFTERS FOR PHASED ARRAY
APPLICATIONS
V. JANARDHANA, S. PAMIDIGHANTAM, R.G. KULKARNI, J.S. ROY
Abstract.
Novel design of Fabrication and simulated results for wide band Phase
Shifters using surface micro machined cascaded microstrip is presented for
Radar Phased array and communication Systems. The design configuration
consists of CPW Input feed, Microstrip bridge, CPW output feed (CPWMS-CPW).
The Microstrip Bridge in the form of transmission line provides variable
impedance to the two end ports.
The upstate numerically simulated results using Electromagnetic software
MWS –CST Germany and wafer level measured results are presented. The
results are presented for two cascaded and three-cascaded CPW-MS-CPW
configurations of phase shifters.
|
Phase Shifter
Configuration |
S11
(M) |
S11
(S) |
S21
(M) |
S21
(S) |
S21
(PM) |
S21
(PS) |
|
2-Cascaded |
21.6 |
15.1 |
1.3 |
0.8 |
176 |
157 |
|
3-Cascaded |
9.6 |
7.8 |
33.3 |
1.7 |
273 |
242 |
•
2–Cascaded: Two Cascaded CPW-MS-CPW Configuration results in dB at
15 GHz.
• 3–Cascaded: Three Cascaded CPW-MS-CPW Configuration results in dB
at 15 GHz.
• (M) – Measured, (S) – Simulated, (PM) – Phase
Measured in degrees and (PS) – Phase Simulated in degrees. The down
state wafer level measurements and simulated results are also
presented.
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