Optimized Differential TCDA (D-TCDA) With Novel Differential Feed Structure

Modern phased arrays require large instantaneous bandwidths, wide fields of view, and low profiles to conduct multiple functions. Many these rely on emerging high speed ADCs advanced balanced transceivers. The benefits front-ends include improved linearity, dynamic range, isolation, noise resilience. application a differential array in such system removes extraneous losses caused by baluns, though the issue feed-borne E-plane scan resonances must be considered. We address resonance through an Balanced Wideband Impedance Transformer (BWIT) feed for ultra-wideband (UWB) Tightly Coupled Dipole Array (TCDA). This BWIT has already demonstrated mitigated common-modes over 3:1 bandwidth ratio while scanning angles. Here, our TCDA (D-TCDA) is developed L-C band (viz. 1.0 GHz 6.1 GHz) with emphasis resonance-free wide-angle scanning. Rigorous EM model circuit analysis included verify performance. Under VSWR <; 3 definition, achieves 6:1 impedance (BWR) all planes. An exception H-plane at 60° where 4. simulations are verified measurements 8×8 single-polarized prototype.