NDLI: A wideband built-in antenna with omni-directional radiation pattern using dual radiators for wireless terminals

Content Provider	IEEE Xplore Digital Library
Author	Byoung Nam Kim Seong-Ook Park Young-Sang Yoon Jung-Keun Oh Gwan-Young Koo
Copyright Year	2005
Description	Author affiliation: Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea (Byoung Nam Kim; Seong-Ook Park)
Abstract	A new built-in antenna is proposed with omni-directional radiation characteristics and wideband for wireless terminals. Bandwidth of built-in antenna is dependent on length and width of the chassis [Outi Kivekas (2003)]. Radiation characteristics of built-in antenna are also very sensitive to chassis size and mounting position. When size of chassis is increased, radiation pattern characteristics of built-in antenna are more degenerative in the high frequencies (1800MHz/spl sim/2200MHz) than those of antenna in the low frequency (900MHz) among current cellular services. This paper proposes a balanced dual radiators built-in antenna with special impedance matching branch for bar-type handsets (45mm /spl times/ 100mm), which built-in antenna is operating at PCS and IMT-2000 band. Using suggested technique, we improved -6dB impedance bandwidth by about 75% and also obtain the omni-directional radiation pattern even though which is mounted on relatively large chassis.
File Size	241416
File Format	PDF
ISBN	078039433X
DOI	10.1109/APMC.2005.1606855
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-04
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadband antennas Antenna radiation patterns Bandwidth Frequency Antenna feeds Antenna measurements Impedance matching Telephone sets Directive antennas Slot antennas Finite Ground Built-in antenna Radiation pattern Dual radiators Feed position
Content Type	Text
Resource Type	Article

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