A 1.2-12 GHz Sliced Notch Antenna Array

作者：Logan John T^*; Kindt Rick W; Vouvakis Marinos N

来源：IEEE Transactions on Antennas and Propagation, 2018, 66(4): 1818-1826.

DOI：10.1109/TAP.2018.2809476

• Flared notch
• phased arrays
• sliced-notch
• tapered slot
• ultrawideband (UWB) antennas
• Vivaldi arrays

Historically, Vivaldi arrays are known to suffer from high cross-polarization when scanning in the nonprincipal planes-a fault without a universal solution. In this paper, a solution to this issue is proposed in the form of a new Vivaldi-type array with low cross-polarization termed the Sliced Notch Antenna (SNA) array. For the first proof-of-concept demonstration, simulations and measurements are comparatively presented for two single-polarized 19 x 19 arrays-the proposed SNA and its Vivaldi counterpart-each operating over a 1.2-12 GHz (10:1) band. Both arrays are built using typical vertically integrated printed-circuit board cards, and are designed to exhibit VSWR < 2.5 within a 60 degrees scan cone over most of the 10:1 band as infinite arrays. Measurement results compare very favorably with full-wave finite array simulations that include array truncation effects. The SNA array element demonstrates well-behaved polarization performance versus frequency, with more than 20 dB of D-plane theta = 45 degrees polarization purity improvement at the high frequency. Moreover, the SNA element also: 1) offers better suppression of classical Vivaldi E-plane scan blindnesses; 2) requires fewer plated through vias for stripline-based designs; and 3) allows relaxed adjacent element electrical contact requirements for dual-polarized arrangements.

• 出版日期2018-4