An Independently Tunable Tri-band Antenna Design for Concurrent Multi-band Single Chain Radio Receivers

摘要

In this paper, a novel tunable tri-band antennaudis presented for concurrent, multi-band, single chain radioudreceivers. The antenna is manufactured on a 50×100 mm FR4udprinted circuit board (PCB), and is able to provide three concurrent,udindependently tunable operating bands covering a frequencyudrange from 600 MHz to 2.7 GHz. The antenna performanceudis investigated for both numerical and experimental methodsudwhen using, first, varactor diodes and, second, digitally tunableudcapacitors (DTCs) to tune frequencies, which shows the antennaudgain can be improved by up to 2.6 dBi by using DTCs. Audhardware-in-the-loop test-bed provides a system level evaluationudof the proposed antenna in a direct RF digitized, concurrent,udtri-band radio receiver. By measuring the receiver’s error vectorudmagnitude, we demonstrate sufficient isolation between concurrentudbands achieving 30 MHz of aggregated bandwidth as welludas strong resilience to adjacent blockers next to each band. Theuddata reported in this article are available from the ORDA digitaludrepository (https://doi.org/10.15131/shef.data.5346295).