A Wide-Band Self-Complementary Tightly-Coupled Dipole Array With ±80° Scanning Range in the E Plane

Abstract

When a magnetic current antenna is parallel to a metal ground, it can produce a nearly 180°3 dB beamwidth in the E plane, which can achieve a wide-angle scanning range in the E plane. But the bandwidth of an equivalent magnetic current antenna is usually narrow. Therefore, we propose a selfcomplementary tightly-coupled dipole array (SC-TCDA) to achieve a wide-band magnetic current antenna, which has a wide-angle scanning range. A reflective cavity is added below the SC-TCDA. And a wideangle impedance matching (WAIM) layer is added on the SC-TCDA. For an infinite array, the SC-TCDA can work over the band of 1.85-6.05 GHz (VSWRs<2.5) at the broadside, scan to ±80°in the E plane over the band of 2.2-5.95 GHz (VSWRs<2.5), ±40°in the H plane over the band of 1.9-6 GHz (VSWRs<2.5), and ±70°in the D plane over the band of 1.85-6.15 GHz (VSWRs<2.5). The efficiencies in different planes are greater than 80% for an infinite array. The profile of the proposed SC-TCDA is only 0.14 wavelengths at 2.2 GHz. An SC-TCDA with 16 × 16 elements is fabricated and measured. The measured and simulated results are in good agreement. INDEX TERMS Wide-band magnetic current antenna, tightly coupled dipole array, self-complementary, wide-angle impedance matching.

An Ultrathin Low-Profile Tightly Coupled Dipole Array Fed by Compact Zigzagging Baluns

“…A novel differential feed structure [18] has been expanded. Thirdly, wide-angle impedance-matching (WAIM) structures [22][23][24][25][26][27][28][29][30][31] Electronics 2023, 12, 2752 2 of 19 have been developed. Many new meta-surfaces have been designed as two-dimensional WAIMs [22][23][24][25][26][27][28].…”

“…Thirdly, wide-angle impedance-matching (WAIM) structures [22][23][24][25][26][27][28][29][30][31] Electronics 2023, 12, 2752 2 of 19 have been developed. Many new meta-surfaces have been designed as two-dimensional WAIMs [22][23][24][25][26][27][28]. Vertically directive metamaterials have been utilized as three-dimensional WAIMs [29][30][31].…”

2–18 GHz dual‐polarised tightly coupled dipole array with ±75° scanning range

“…However, scanning range remains constrained to �45°in the H plane. Tightly coupled dipole arrays (TCDAs) [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] also possess the UWB property and are attracting more and more attention due to the wide operating bandwidth, large scanning ranges, low profile and low cross-polarised (cross-pol.) radiation.…”

“…Tightly coupled dipole arrays (TCDAs) [7–26] also possess the UWB property and are attracting more and more attention due to the wide operating bandwidth, large scanning ranges, low profile and low cross‐polarised (cross‐pol.) radiation.…”

“…To enhance scanning range, a self‐complementary TCDA is proposed in Ref. [10], achieving a wideband magnetic current antenna capable of scanning up to ±80° in the E plane. However, H‐plane scanning range remains ±45°.…”