A novel design of a 10-dipole log-periodic antenna with LTE-800 and GSM-900 band rejection

摘要

This study presents a novel design of a 10-dipole log-periodic dipole antenna capable of rejecting 4G-LTE mobile service 800 MHz band as well as GSM 900 MHz band. The proposed antenna provides a cost-efficient solution to solve interference problems caused due to the coexistence of TV broadcasting services and LTE mobile services, without using any external band stop filters. The antenna design presented in this paper operates in the frequency range of 450 MHz – 790 MHz (UHF TV reception passband), thereby rejecting the LTE 800 MHz band as well as the GSM 900 MHz band. The proposed design provides good matching for the antenna in the passband. The antenna has a relatively high gain around 8 dBi in the passband which drops to −5 dBi in the stopband. Furthermore, the antenna is highly directive throughout the passband.