Phase Control in Small Linear Antenna Arrays Based on LNA's Parasitic Phase Shifts

We have in this paper, reported on the investigation and validation of the existence of parasitic phase shifts. The cases of HEMT FHX35LG in [4] and E-pHEMT MGA53543 were used for validation, where in both cases; similar phase shifting behaviour was exhibited. This behaviour was exploited for a pre-liminary design of a small linear antenna array. Future work will involve array structures with more than 2 elements. The limitations of using our approach in highly populated arrays will be investigated. Miniaturization of the designed parasitic phase shifter to chip level shall remain a challenge for the industry.