[논문]Design and Implementation of Broadband Antenna and Diplexer for Dual- Band Handsets

Joung, Myoung-Sub; Park, Jun-Seok; Kim, Hyeong-Seok; Lim, Jae-Bong; Cho, Hong-Goo

Design and Implementation of Broadband Antenna and Diplexer for Dual- Band Handsets 원문보기

KIEE international transactions on electrophysics and applications, v.4C no.6, 2004년, pp.288 - 294

Joung, Myoung-Sub (School of Electrical Engineering, Kookmin University) , Park, Jun-Seok (School of Electrical Engineering, Kookmin University) , Kim, Hyeong-Seok (Dept. of Electrical and Electronics Engineering, Chungang University) , Lim, Jae-Bong (School of Electrical Engineering, Kookmin University) , Cho, Hong-Goo (School of Electrical Engineering, Kookmin University)

Abstract ▼ AI-Helper

In this paper, a ceramic antenna and diplexer are designed for dual-band handset ap plications. Basically, the antenna is designed by using the meander line configuration. The diplexer presented in this paper is composed of both low- and high-pass filters. We have designed the low- and high-pass filters with attenuation poles to improve the attenuation performances of the diplexer. The attenuation poles are located at each rejection frequency region so as to improve the shrinkage characteristic of the diplexer. In order to accomplish the volume effectiveness, the antenna and the diplexer have been designed and fabricated in a multi-layer structure. The diplexer designed with a multi-layer structure has inductors and capacitors, which are implemented by LTCC (Low Temperature Co-fired Ceramics) process technique. Design of the multi-layer antenna and diplexer has been achieved by employing the full 3-D EM simulation. The designed antenna and diplexer offer excellent return loss and broadband performances with highly isolated rejection performance.

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가설 설정

By employing the embedded LC matching circuit, the broa㏈and matching performance, which could cover the GPS and IMT-2000 services, can be achieved as indicated in Fig. 4. At the frequency band of 1.6㎓ ~ 2.2㎓, the return loss shows a level below -15㏈. The dimension of the designed antenna with embedded LC matching circuit is 16×13×2 ㎜ with relative permittivity er of 7.

제안 방법

After determining the element values for the embedded matching circuit, we constructed the physical meander line antenna with embedded LC matching circuit for 3-D EM simulation. Fig.
In this paper, we designed 7-section low-pass and high-pass filters for implementation of the diplexer. In order to effectively achieve the size reduction of the diplexer, the proposed structure is properly arranged by the multi-layer structure inductor and capacitor passive components in the chip by using the LTCC technique. We have designed the multi-layer antenna and diplexer by employing the full 3-D EM simulation with iterative design procedures.

대상 데이터

circuit. The process used for fabrication is LTCC technology. Fig.

성능/효과

42㎒] band IMT- 2000 band to employ a meander line structure that can implement relative wide band characteristic and higher gain. Furthermore, the ceramic antenna presented in this paper demonstrated the characteristics of broa㏈and and high-gain performance with the inductor and capacitor, and achieved the matching network for the designed meander antenna. The diplexer splits in the transmitted signal (Tx) and the received signal (Rx) at the front-end unit of wireless co㎜unication systems with comparative wide band performance.

참고문헌 (7)

A. A, Kishk, M. R. zunoubi and D. Kajfez, 'A Numerical Study of a Dielectric Disk Antenna above a Grounded Dielectric Substrate', IEEE Trans. on Antennas and Propagation, AP-41, pp.812-821, June 1993
Raiesh Kumar Mongia, Apisak Ittipiboon, 'Theoretical an Experiemental Investigations on Rectangular Dielectric Resonator Antennas', IEEE Trans. on Antennas and Propagation, vol. 45, no. 9, pp.1348-1356, Sep 1997
Jong-Hwan Lee, Jong-Myung Woo, 'Design of a Surface-mounted Chip Dielectric Ceramic Antenna for PCS Phone', The Journal of Korea Electromagnetic Engineering Society, vol. 11, no. 1, pp.55-62, Jan 2000
Atef Z. Elsherbeni, Chun-Wen Paul Huang and Charles E. Smith, 'Wide Band Meanser line Antenna for Wireless Communication Systems', IEEE AP-S, pp.17-20, 2000
Keisuke Noguchi and Motoo Mizusawa, 'Numerical Analysis of the Radiation Characteristics of the Meander Line Antennas Consistig of Two-Strips', APS, Digest. vol.3, 1996
Shyh-Timg Fang, 'A Novel Polarization Antenna for WLAN Applications', Proc. IEEE APS/URSI Inter. Symp. vol. 1, July 200
Jung-Ick Moon, Seong-Ook Park, Duck-Jae Lee, Yong-Seong Wang, Chung-Kook Lee 'The Design of Small Size and High Gain Chip Ceramic Dielectric Antenna for Bluetooth Application' The Korea Electromagnetic Engineering Society, vol 12, no 6, pp.983-993, Oct 2001

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