| Paper Abstract and Keywords |
| Presentation |
2026-01-30 10:40
Design and Analysis of Frequency-Tunable Circularly Polarized Microstrip Patch Antenna Using Varactor-Loaded Ring-Slot Structure
Yuki Hirayama (Saga Univ.), Htet Wai Htun (NICT), Eisuke Nishiyama, Ichihiko Toyoda (Saga Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This paper investigates a circularly polarized (CP) microstrip antenna with a frequency-tuning capability. The proposed antenna consists of a patch with an embedded ring slot, together with a varactor diode and a chip capacitor. The introduction of a chip capacitor forms a split-ring slot, and frequency tuning as well as CP excitation is achieved by electrically varying the effective length of the split-ring slot using the varactor diode. In addition, a simple biasing structure employing a via is adopted to apply the control voltage to the diode, which helps miniaturize the antenna. The operating mechanism and performance of the proposed antenna are verified through simulations, and a frequency tuning range of approximately 1 GHz (15%) in the 5.8-GHz band is achieved while maintaining CP characteristics over the entire tuning range. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Bias Decoupling / Circular Polarization / Frequency Tuning / Microstrip Antenna / Ring Slot / / / |
| Reference Info. |
ITE Tech. Rep., vol. 50, no. 3, BCT2026-13, pp. 50-53, Jan. 2026. |
| Paper # |
BCT2026-13 |
| Date of Issue |
2026-01-22 (BCT) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
|
| Conference Information |
| Committee |
BCT KYUSHU IEEE-BT IEEE-AP-S-FUKUOKA |
| Conference Date |
2026-01-29 - 2026-01-30 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Kyushu Sangyo University |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
|
| Paper Information |
| Registration To |
BCT |
| Conference Code |
2026-01-BCT-KYUSHU-BT-AP-S-FUKUOKA |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Design and Analysis of Frequency-Tunable Circularly Polarized Microstrip Patch Antenna Using Varactor-Loaded Ring-Slot Structure |
| Sub Title (in English) |
|
| Keyword(1) |
Bias Decoupling |
| Keyword(2) |
Circular Polarization |
| Keyword(3) |
Frequency Tuning |
| Keyword(4) |
Microstrip Antenna |
| Keyword(5) |
Ring Slot |
| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Yuki Hirayama |
| 1st Author's Affiliation |
Saga University (Saga Univ.) |
| 2nd Author's Name |
Htet Wai Htun |
| 2nd Author's Affiliation |
National Institute of Information and Communications Technology (NICT) |
| 3rd Author's Name |
Eisuke Nishiyama |
| 3rd Author's Affiliation |
Saga University (Saga Univ.) |
| 4th Author's Name |
Ichihiko Toyoda |
| 4th Author's Affiliation |
Saga University (Saga Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-01-30 10:40:00 |
| Presentation Time |
20 minutes |
| Registration for |
BCT |
| Paper # |
BCT2026-13 |
| Volume (vol) |
vol.50 |
| Number (no) |
no.3 |
| Page |
pp.50-53 |
| #Pages |
4 |
| Date of Issue |
2026-01-22 (BCT) |