Compact E-band planar quasi-Yagi antenna with folded dipole driver

TLDR: In this paper, a broadband planar quasi-Yagi antenna using a folded dipole driver is presented for millimetre-wave applications using low-cost thick-film fabrication.

Abstract: A broadband planar quasi-Yagi antenna using a folded dipole driver is presented The new antenna element is realised on a low dielectric constant substrate and it is suitable for millimetre-wave applications using low-cost thick-film fabrication The advantage of the quasi-Yagi antenna with folded dipole driver compared to the standard quasi-Yagi antenna is a reduction in the length of the driver, which allows closer spacing of the elements for array applications on low dielectric constant substrates Use of the folded dipole driver gives a 4:1 impedance range because of its extra parameters The element was designed for E-band applications, but operates over a much wider bandwidth of approximately 13:1 Mutual coupling between two antenna elements in an array environment is investigated and results obtained are similar to conventional quasi-Yagi antenna elements Four linear arrays, each containing four elements and having a different beamforming network, were fabricated to demonstrate the scanning capabilities of the folded dipole quasi-Yagi antenna, and measured reflection coefficient, radiation patterns and gain for each array are presented