A Compact Frequency Reconfigurable Antenna for LTE Mobile Handset Applications

Abstract EN

A compact (8 × 62 × 5 mm3; 2.48 cc) frequency reconfigurable antenna that uses electrical switching with PIN diodes is proposed for the low frequency LTE band (699 MHz–862 MHz), high frequency LTE band (2496 MHz–2690 MHz), GSM850/900 bands (824 MHz–960 MHz), and DCS/PCS/WCDMA bands (1710 MHz–2170 MHz).

The penta-band PIFA is first designed for GSM850/900/DCS/PCS/WCDMA bands by using two slits and ground pins within a limited antenna volume (8 × 54.6 × 5 mm3; 2.18 cc).

The frequency reconfigurable antenna based on this penta-band PIFA is thus proposed to additionally cover all LTE bands.

The proposed antenna has two PIN diodes with an optimal location.

For State 1 (PIN diode 1: ON state, PIN diode 2: OFF state), the proposed antenna covers the low frequency LTE band, DCS/PCS/WCDMA bands, and high frequency LTE band.

For State 2 (PIN diode 1: OFF state, PIN diode 2: ON state), the antenna covers the GSM850/900 bands.

Simulated and measured results show that the total efficiency of the proposed antenna was greater than 40% for all operating frequency bands.