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http://dx.doi.org/10.5515/KJKIEES.2008.19.7.778

Multi-Band Internal Chip Antenna Using Multi-Layer Substrate for Mobile Handset  

Cho, Sang-Hyeok (Department of Radio Communication Engineering, Korea University)
Cho, Il-Hoon (Department of Research and Development, AMOTECH)
Lee, In-Young (Department of Research and Development, AMOTECH)
Pyo, Seong-Min (Department of Radio Communication Engineering, Korea University)
Baik, Jung-Woo (Department of Radio Communication Engineering, Korea University)
Kim, Young-Sik (Department of Radio Communication Engineering, Korea University)
Publication Information
Abstract
In this paper, a chip antenna using multi-layer configuration for multi-band operation, such as GSM, DCS, pcs, WCDMA, and Mobile WiMAX for 2.3 GHz is proposed. This proposed antenna is a PIFA structure with multi-layer configuration fabricated on R04003 substrate(${\varepsilon}_r=3.4$) and its size is $22{\times}5.5{\times}4.0\;mm^3$. Multi-layer structure can effectively reduce the size of an antenna from a reuse of air-space and can achieve broad bandwidth due to decrement of parallel capacitances from the insertion air-gap to the middle layer. The proposed antenna has a broadband operation by the high order resonance modes and the resonance at the top layer. The measured bandwidths with over 45 % radiation efficiency are 80 MHz($880{\sim}960\;MHz$) at the lower band and 690 MHz($1,710{\sim}2,400\;MHz$) at the higher band.
Keywords
Internal Antenna; Multi-Band Antenna; Mobile Handset; Chip Antenna; Multi-Layer; Air-Gap;
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