New uniplanar coplanar waveguide hybrid-ring couplers and magic-T's
| Autor: | Kai Chang, Lu Fan, Chien-Hsun Ho |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Engineering
Radiation business.industry Coplanar waveguide Bandwidth (signal processing) Impedance matching Condensed Matter Physics Balun Transmission line Electronic engineering Optoelectronics Magic tee Hybrid coupler Electrical and Electronic Engineering business Monolithic microwave integrated circuit |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 42:2440-2448 |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/22.339779 |
| Popis: | The uniplanar coplanar waveguide (CPW) and slotline on a dielectric substrate have many applications to MIC and MMIC designs. A new reverse-phase CPW hybrid-ring coupler and a uniplanar CPW magic-T were developed. Experimental results showed that the hybrid-ring coupler has a 60% bandwidth centered at 3 GHz and the magic-T has a bandwidth of one octave from 2 to 4 GHz with 0.4 dB amplitude imbalance and 3.5/spl deg/ phase imbalance. Also, this paper presents theoretical analyses of CPW-slotline transitions using the transmission line models. Accurate modeling of nonuniform CPW and slotline radial stubs was developed using tandem connected uniform lines. Measured results of various CPW-slotline transitions agree very well with calculation. Design curves of the transitions are given for practical applications. To fully use the advantages of uniplanar structures, a 180/spl deg/ reverse-phase CPW-slotline back-to-back balun and a tee junction are described. Both circuits provide good amplitude and phase characteristic over a broad bandwidth due to the phase change of the circuits being independent of frequency. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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