A three-dimensional quasi-optical source is presented, consisting of several C-band grid oscillators mounted on a photonic-crystal cube. By allowing the grids to oscillate at a frequency along the band edge of the PC, back-radiation from each grid mutually injection-locks the others. Experimental results indicate that this structure is potentially useful for omnidirectional active antennas.

A three-dimensional quasi-optical source

https://link-springer-com-443.webvpn.jmu.edu.cn/content/pdf/10.1007%2F978-981-4560-75-7_42-2.pdf

Fresnel Zone Plate Antenna

A 28-GHz endfire (modified Vivaldi) active antenna is described that contains a secondary, circularly polarized patch antenna for reception of an external injection-locking signal. Three of these devices are used to characterize an octagonal cylindrical reflector designed for creating an omni-directional transmitter suitable for use in point-to-multipoint communication systems. The experiments provide data that validates the approach used to simulate the azimuthal radiation patterns. These simulations are then extended to predict the patterns from a full eight-element array.

M.J. Vaughan

Papers

Injection-locked 28-GHz oscillator array with disk-cylinder reflector