NDLI: Multiband antenna-receiver integration using an RF multiplexer with sensitivity-constrained design

Content Provider	IEEE Xplore Digital Library
Author	Hasan, S.M.S. Ellingson, S.W.
Copyright Year	2008
Description	Author affiliation: Bradley Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA (Hasan, S.M.S.; Ellingson, S.W.)
Abstract	In this paper we consider an alternative approach which exploits the fact that the single-chip transceivers from which practical multiband radios are likely to be built consist of multiple receivers operating in parallel, each of which can be directly connected to a dedicated off-chip filter. In this case an RF multiplexer can be used to segment the tuning range into multiple bands. Once partitioned in this manner, the interface for lower frequency bands - the most troublesome as noted above - can be separately optimized not for match efficiency, but rather for effective sensitivity, exploiting the high levels of environmental noise known to exist at these frequencies [4]. We demonstrate the technique by designing an antenna interface which yields acceptable performance for operation in four bands - 138-174 MHz, 220-222 MHz, 406-512 MHz, and 764-862 MHz - when used with a monopole just 20 cm long with 5 mm radius, assuming front end noise figure in the range 1-2 dB. Such noise figures are well within the capabilities of existing low-cost electronics.
Starting Page	1
Ending Page	4
File Size	425997
Page Count	4
File Format	PDF
ISBN	9781424420414
DOI	10.1109/APS.2008.4619608
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise Receivers Multiplexing Antennas Impedance Transceivers Integrated circuit modeling
Content Type	Text
Resource Type	Article

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