Compact Quintplexer Module With Passive Triplexer for US-CDMA Handset Applications
In this article, compact quintplexer modules with apassive triplexer circuit were newly designed, implemented, comparedfor US-CDMA handset applications. The proposed passive triplexercircuit was comprised of a single diplexer, parallel resonant circuit,bandpass filter for GPS, and its impedance matching circuit. Althoughthe number of passive components to comprise the proposed triplexerand its size were dramatically reduced, its performance characteristicswere much better than the previously reported modules. Moreover, forrealization of compact quintplexer module with small size and volume,FBAR filter bare chips and system in package technology were utilizedinstead of an US-PCS packaged duplexer. Its excellent performanceswere good enough to directly apply for currently used handsets.Simulated and measured performance characteristics of fabricatedtriplexer and quintplexer module were well agreed. The fabricatedquintplexer module had a 7.0 5.0 1.4 mm 3 volume.
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