Title :
Low profile double resonance frequency tunable antenna using RF MEMS variable capacitor for digital terrestrial broadcasting reception
Author :
Tsutsumi, Yakako ; Nishio, Masaki ; Obayashi, Shuichi ; Shoki, Hiroki ; Ikehashi, Tamio ; Yamazaki, Hiroaki ; Ogawa, Etsuji ; Saito, Tomohiro ; Ohguro, Tatsuya ; Morooka, Tasuku
Author_Institution :
Corp. R&D Center, Toshiba Corp., Kawasaki, Japan
Abstract :
It is difficult to realize the built-in antenna for wideband systems, because a frequency bandwidth of the low profile antenna is narrow. A frequency tunable antenna is a technique for wideband characteristics. In this paper a low profile double resonance frequency tunable antenna using MEMS variable capacitors is presented. It has high efficiency over a wide frequency band. Through both resonant portions from 465 to 665 MHz, the efficiency of more than -4 dB and the VSWR of less than 3 are observed in the measurement using the variable capacitor of 0.4-0.9 pF.
Keywords :
broadband antennas; digital video broadcasting; RF MEMS variable capacitor; capacitance 0.4 pF to 0.9 pF; digital terrestrial broadcasting reception; frequency 465 MHz to 665 MHz; low profile double resonance frequency tunable antenna; Bandwidth; Broadband antennas; Capacitors; Micromechanical devices; Mobile antennas; Printed circuits; Radiofrequency microelectromechanical systems; Resonance; Resonant frequency; Tunable circuits and devices;
Conference_Titel :
Solid-State Circuits Conference, 2009. A-SSCC 2009. IEEE Asian
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4433-5
Electronic_ISBN :
978-1-4244-4434-2
DOI :
10.1109/ASSCC.2009.5357195
