Circularly polarised printed tilted beam antenna

Abstract

A cavity‐backed printed crank‐line array antenna is presented as an inverted microstrip line structure for producing high gain circularly polarised (CP) tilted beam. The crank‐line antenna element, in travelling wave condition, is fed with a printed Z‐feed and terminated at the other end with a vertical open‐ended printed stub. Single element exhibits an impedance bandwidth of 20% (3.6–4.4 GHz) for a VSWR<2. A beam tilt of 35° with CP gain around 7.8 dBic is measured for an axial ratio of 2 dB at 4 GHz. A cavity‐backed printed crank‐line array with a tilted beam is formed by connecting two open crank‐line radiation elements. The measured gain of the array is around 10.5 dBic across the operating frequency for an axial ratio <3 dB. A beam tilt of 46° is achieved.

A Low-Profile Quasi-Loop Magneto-Electric Dipole Antenna Featuring a Wide Bandwidth and Circular Polarization for 5G mmWave Device-to-Device Communication

“…The ME dipole described in [19] accomplished a bandwidth >14 GHz, but it occupied a large area of ~12𝜆 along with a complex design. Likewise, the lumped LC resonators [21] and the traveling-wave [31], helical [33], and hybrid helical-spiral [35] structures left a considerable footprint. In contrast with the recent ME dipole antennas presented in [57][58][59][60], the proposed antenna outperforms in terms of its simple design, low cost, compact size, and large bandwidth.…”

“…As a result, omnidirectional gain patterns on CP antennas are beneficial for shortrange communication [26][27][28][29]. CP antennas can be categorized into four distinct types corresponding to their working principles: complementary dipole [30], traveling wave [31], lens [32], and turnstile structures (for instance, the helical [33], spiral [34], hybrid helical-spiral [35], or loop [36]). However, the majority of these practices illustrate complicated configurations or high profiles.…”

A novel dual‐mode patch antenna with pattern diversity and beam‐tilting for aircraft applications

“…In these works, however, only the beam tilting of the antennas was discussed, and pattern diversity design was not mentioned. A cavity‐backed printed crank‐line array antenna was developed in Reference with a beam tilt of 35°. A rectangular aperture antenna that was cavity‐backed has also been presented that can radiate a tilted beam at approximately 27°.…”