| Presentation | 2000/2/17 Lumped-Element 3 dB Hybrids Tadashi Kawai, Yoshihiro Kokubo, Isao Ohta, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A size reduction of passive devices is a key technology for a large-scale and cost-effective MMICs. From this point of view, the present paper treats 180° and 90° lumped-element hybrids by the use of an invariant and an equivalent impedance (admittance) for symmetric lossless reciprocal 4-port circuits, systematically and analytically. We show various concrete circuit-constructions consisting of unbalanced lines, balanced lines and / or a phase inverter, and their frequency properties, and mention essential factors leading to a limited bandwidth and an unbalanced power-division. As a result, several interesting circuit structures are suggested, i.e., an unbalanced line 180° hybrid with a phase inverter posseses about one octave bandwidth, an unbalanced line 90° hybrid with external matching networks exhibits a very flat coupling over a fractional bandwidth of 26%, and the bandwidth ratio of a balanced line 180° hybrid reaches 1.76 octaves. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | microwave / microwave passive component / hybrid / directional coupler / lumped-element circuit |
| Paper # | SST99-55,ITS99-51,A・P99-177,RCS99-197,MW99-217 |
| Date of Issue |
| Conference Information | |
| Committee | AP |
|---|---|
| Conference Date | 2000/2/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Lumped-Element 3 dB Hybrids |
| Sub Title (in English) | |
| Keyword(1) | microwave |
| Keyword(2) | microwave passive component |
| Keyword(3) | hybrid |
| Keyword(4) | directional coupler |
| Keyword(5) | lumped-element circuit |
| 1st Author's Name | Tadashi Kawai |
| 1st Author's Affiliation | Department of Electronics, Faculty of Engineering, Himeji Institute of Technology() |
| 2nd Author's Name | Yoshihiro Kokubo |
| 2nd Author's Affiliation | Department of Electronics, Faculty of Engineering, Himeji Institute of Technology |
| 3rd Author's Name | Isao Ohta |
| 3rd Author's Affiliation | Department of Electronics, Faculty of Engineering, Himeji Institute of Technology |
| Date | 2000/2/17 |
| Paper # | SST99-55,ITS99-51,A・P99-177,RCS99-197,MW99-217 |
| Volume (vol) | vol.99 |
| Number (no) | 634 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |