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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Verweyen, L. Haydl, W. H. Tessmann, A. Massler, H. Krems, T. Schneider, Jo. |
| Copyright Year | 1996 |
| Description | Author affiliation: Fraunhofer Institute for Applied Solid State Physics (IAF), Tullastr. 72, 79108 Freiburg, Germany. phone: +49-761-51 59 446, fax: +49-761-51 59 565 (Haydl, W H; Tessmann, A; Massler, H; Krems, T; Schneider, Jo.) || Fraunhofer Institute for Applied Solid State Physics (IAF), Tullastr. 72, 79108 Freiburg, Germany. phone: +49-761-51 59 446, fax: +49-761-51 59 565, e-mail: verweyen@iaf.fhg.de (Verweyen, L) |
| Abstract | In this paper, we report on coplanar branch-line and rat-race couplers on GaAs for use in balanced mixers, investigated theoretically and experimentally over the frequency range from DC to 120 GHz. For optimum spurious response suppression at the IF-port of a balanced mixer, a coupler must provide the required phase delay at its ports feeding the non-linear devices. Whereas in microstrip (MS) technology these types of couplers have been extensively investigated in the past, coplanar waveguide (CPW) technology is still lacking similar broadband models, making millimetre-wave circuit design difficult. For the characteristic impedance levels 30, 50 and 67 ¿, a model library was developed for transmission lines and line elements like air bridges and corners, and implemented into HP-MDS. On the basis of these models, we designed a branch-line coupler, a capacitively loaded branch-line coupler and a rat-race coupler for W-band applications. For the analysis of the phase relation between the different ports of these hybrids, 2-port test structures were designed and processed. The 'on-wafer' measured S-parameters of the couplers show excellent agreement with the simulated data in both amplitude and phase over the entire frequency range. |
| Starting Page | 602 |
| Ending Page | 606 |
| File Size | 5388992 |
| Page Count | 5 |
| File Format | |
| DOI | 10.1109/EUMA.1996.337652 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1996-09-06 |
| Publisher Place | Czech Republic |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Couplers Frequency Millimeter wave technology Coplanar waveguides Gallium arsenide Delay Microstrip Circuit synthesis Impedance Libraries |
| Content Type | Text |
| Resource Type | Article |
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