Frequency Measurement Device with Reconfigurable Bandwidth and Resolution

This letter presents a low-cost and compact reconfigurable frequency measurement circuit able to reconfigure bandwidth and resolution, the design uses a varactor loaded phase shifter, a reference delay line, and power divider/combiner to form a 2-bit frequency discriminator with four states for frequency measurement. The reconfigurable discriminator has four bandwidth states of 0.5, 0.9, 1.3, and 1.7 GHz, with uniform subband resolution of 125, 225, 325, and 525 MHz, for each bandwidth state of operation, respectively.Grant numbers : 5G-TRIDENT - 5G Technologies for ReconfIgurable and efficient raDio accEss iNfrastrucTure and mobile devices (RTI2018-099841-B-I00) and miniFIDS - Compact Sensor System for Unmanned Aerial Vehicles (08 January 2015 - 30 September 2017).© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works