| Presentation | 2001/3/7 Compact Feeder Networks and the Design methods for Dual-Frequency Quadrifilar Helical Antennas Tetsu OHWADA, Tsutomu ENDO, Tamotsu NISHINO, Hideyuki OH-HASHI, Moriyasu MIYAZAKI, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This report proposes compact feeder networks for small quadrifilar helical antennas, composed of novel dual-frequency impedance-matching networks and simple 4-way power divider employing transmission line T-junctions. The power divider, however, has poor isolation characteristics between output terminals and its transmission phase characteristics vary with frequency. So, frequency response of the power divider's characteristics and mutual couplings between helical radiating elements must be taken into consideration in design of the feeder networks. And a design method is proposed that impedance-matching networks are optimized by choosing return loss at input terminal of feeder networks, transmission loss in whole feeder networks, and excitation phase characteristics of helical radiating elements as objective functions. A dual-frequency antenna with the feeder networks attached has been fabricated on a cylindrical dielectric tube at S-band. It has given good radiation and return loss characteristics in agreement with calculated results. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Helical antennas / Feeder networks / Impedance matching / Dual-frequency band use / Optimization |
| Paper # | SST2000-73,A・P2000-207,RCS2000-207,MW2000-198 |
| Date of Issue |
| Conference Information | |
| Committee | AP |
|---|---|
| Conference Date | 2001/3/7(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) | Compact Feeder Networks and the Design methods for Dual-Frequency Quadrifilar Helical Antennas |
| Sub Title (in English) | |
| Keyword(1) | Helical antennas |
| Keyword(2) | Feeder networks |
| Keyword(3) | Impedance matching |
| Keyword(4) | Dual-frequency band use |
| Keyword(5) | Optimization |
| 1st Author's Name | Tetsu OHWADA |
| 1st Author's Affiliation | Information Technology R&D Center MITSUBISHI ELECTRIC CORPORATION() |
| 2nd Author's Name | Tsutomu ENDO |
| 2nd Author's Affiliation | Information Technology R&D Center MITSUBISHI ELECTRIC CORPORATION |
| 3rd Author's Name | Tamotsu NISHINO |
| 3rd Author's Affiliation | Information Technology R&D Center MITSUBISHI ELECTRIC CORPORATION |
| 4th Author's Name | Hideyuki OH-HASHI |
| 4th Author's Affiliation | Information Technology R&D Center MITSUBISHI ELECTRIC CORPORATION |
| 5th Author's Name | Moriyasu MIYAZAKI |
| 5th Author's Affiliation | Information Technology R&D Center MITSUBISHI ELECTRIC CORPORATION |
| Date | 2001/3/7 |
| Paper # | SST2000-73,A・P2000-207,RCS2000-207,MW2000-198 |
| Volume (vol) | vol.100 |
| Number (no) | 659 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |