Low‐profile complementary dipole antenna under quadruple mode resonance with nearly equal E‐ and H‐plane patterns

Abstract

Design approach to a planar unidirectional, complementary dipole antenna under quadruple mode resonance is proposed. The design initiates from a planar complementary dipole antenna, with a pair of flat electric dipoles to be closely incorporated with a slot element. As theoretically predicted by the

Backfire dipole antenna with nearly equal E‐/H‐plane patterns enabled by hyperbola‐intersected elliptical reflector under triple‐mode resonance

“…The difference in HPBW between the E‐ and H‐plane is defined as |Δ|. The antenna is considered to have nearly equal E‐ and H‐plane patterns when |Δ| is less than 15° 2,9 . The effects on the shape of the principal reflector are simulated and illustrated in Figure 2.…”

“…It only relies on a simple flat reflector for broadband, octave equal‐beamwidth operation, which is beneficial to exhibit a relatively low height, compared to most bulky designs 1,3–6,9 . Compared to the planar design, 2 its available bandwidth for both impedance matching and equal‐beamwidth is much larger. The unique sectorial configuration and the tangentially loaded, straight stubs can simultaneously yield relatively compact size and simple configuration with less parameter, compared to Xiao et al 9 …”

“…With the rapid development of modern wireless communication, symmetric beam antennas are becoming increasingly desirable 1–3 . Especially, backfire antennas with equal E‐ and H‐planes have been widely used as feed sources for parabolic reflector antenna systems.…”