Development of Microwave and Millimeter-wave Coplanar Waveguide (CPW) Multi-Conductor Interdigitated Couplers
2014
Hochschulschrift
Zugriff:
102
This thesis develops a variety of the microwave and millimeter-wave multi-conductor interdigitated couplers using the coplanar waveguides (CPWs). For microwave range, the CPW multi-conductor interdigitated couplers are realized on the printed circuit board (PCB) substrate, and then applied to implement a balanced amplifier with a broadband return loss bandwidth. Since the multi-conductor couplers are evolved from asymmetrical two-conductor coupled-line, to accurately extract the c- and π-mode impedances of the multi-conductor asymmetrical coupled lines, a simulator-aided design method is proposed in this thesis to overcome the limitation of the commercial electromagnetic simulator. The experimental results demonstrate that the proposed design procedures not only reduce the design complexity and increase the design flexibility, but also develop couplers with wideband and flat quadrature phase responses between output ports. Moreover, as the developed interdigitated couplers are applied to implement a balanced amplifier, one can achieve a 109 % 10-dB return loss bandwidth. For millimeter-wave range, the CPW multi-conductor interdigitated couplers are implemented using the integrated passive device (IPD) technology. Since the IPD nonhomogenous medium will lead to different c- and π-mode phase velocities, this thesis proposes three circuit structures to compensate the difference of c- and π-mode phase constants. The effectiveness of newly proposed structures has been experimentally demonstrated.
Titel: |
Development of Microwave and Millimeter-wave Coplanar Waveguide (CPW) Multi-Conductor Interdigitated Couplers
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Autor/in / Beteiligte Person: | YU-TZU, CHEN ; 陳又慈 |
Link: | |
Veröffentlichung: | 2014 |
Medientyp: | Hochschulschrift |
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