Title :
Tunable Inverted-L Antenna With Split-Ring Resonator Structure for Mobile Phones
Author :
Takemura, Nobuyasu
Author_Institution :
ER Center, Samsung Yokohama Res. Inst., Yokohama, Japan
fDate :
4/1/2013 12:00:00 AM
Abstract :
A design of a miniaturized tunable inverted-L antenna for mobile phones is proposed. The design integrates an inverted-L antenna with a split-ring resonator (SRR) structure. Although the use of SRRs to the inverted-L antenna achieves compact volume, the antenna´s radiation efficiency rapidly decreases around the SRR´s resonant frequency. The decrease is avoided by using a variable capacitance diode loaded on the SRR conductor. The proposed antenna has a compact volume of 1 × 10 × 50 mm3 (0.5 cm3), and can be tuned to the wide range, low frequency LTE700/GSM850/GSM900 bands (698-960 MHz). Simulation and measurement results showed the antenna obtains wideband and multi-band characteristics that enable it to cover the LTE700/GSM850/GSM900 and the LTE2600 bands.
Keywords :
Long Term Evolution; UHF antennas; UHF diodes; UHF resonators; antenna radiation patterns; cellular radio; mobile handsets; LTE2600 bands; SRR conductor; SRR resonant frequency; SRR structure; antenna radiation efficiency; frequency 698 MHz to 960 MHz; frequency LTE700-GSM850-GSM900 bands; miniaturized tunable inverted-L antenna; mobile phones; split-ring resonator structure; variable capacitance diode; Antenna measurements; Broadband antennas; Capacitance; Conductors; Resonant frequency; Wideband; Inverted-L antenna; mobile phone; multi-band; split-ring resonator; tunable antenna; wideband;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2232894
