Why you can trust What Hi-Fi? Our expert team reviews products in dedicated test rooms, to help you make the best choice for your budget. Find out more about how we test. Roberts likes a radio ...

Two tuners were developed for this receiver. The more sensitive one uses tetrode transistors in the RF amplifier, mixer and oscillator. Its disadvantages lie in a much higher cost and a 12 to 14 db ...

Abstract: A novel scheme for designing electromagnetic functional surfaces (EMFSs) is proposed in this article. Different from traditional frequency selective surface (FSS), this scheme uses the ...

Abstract: For wideband frequency-agile radio frequency (RF) integrated circuits, tunable components are essential. It has been a great challenge in RF electronics to utilize a magnetic tunable ...