| Title |
Circuit Modelling and Design of a Compact Dual-Band Hybrid Coupler for GPS Satellite Wireless Signal Reception |
| Authors |
조정현(Junghyun Cho) ; 서예준(Yejune Seo) ; 고재원(Jaewon Koh) ; 장지연(Jiyeon Jang) ; 이예진(Yejin Lee) ; 박중기(Joong-ki Park) ; 이호섭(Ho-Sub Lee) ; 강승택(Sungtek Kahng) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.1.93 |
| Keywords |
Power Divider; Branch-Line Coupler; GPS; Dual-Band; Circuit Modelling |
| Abstract |
This paper presents a compact branch-line coupler working for receiving GPS signals at two adjacent frequencies as one geometry.
The GPS receiver must have the feed circuit handling a circularly polarized electric field entering the radiating element leading up to division into quadrature branches, which has been used in the conventional works. But, it takes one frequency and a new approach is needed to take two frequencies. A lattice comprising segments loaded with series and parallel capacitors and circumferential inductors is built to make the branch-line coupler handle two frequencies. L1 and L2 bands for GPS are chosen and the circuit modelling is conducted to design the component. The method is verified by running a microwave circuit simulator and measurement of the s-parameters of the fabricated prototype. The power division and reflection coefficient at 1.5 GHz as L1- and 1.2 GHz as L2-band show the result is in good agreement with the required performance. |