A Pattern Reconfigurable Circularly Polarized Quadrifilar Helix Antenna Through Phase Control

Sun, Wen; Su, Guodong; Sun, Lingling; Chen, Xiao

doi:10.1109/tap.2022.3164197

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…In fact, it is important to note that, in this work, we have intentionally avoided the use of active components for antenna reconfiguration. Active components such as switches or actuators are abundant in the literature for reconfiguring antenna structures of various topologies and serving different implementations such as in QHAs 52,53 . However, antennas that depend on electrical reconfiguration require additional biasing power, which must be accounted for as part of the power budget of the design, a constraint that we are minimizing in our design.…”

Section: Discussionmentioning

confidence: 99%

A multi-stable deployable quadrifilar helix antenna with radiation reconfigurability for disaster-prone areas

Bichara,

Costantine,

Tawk

et al. 2023

Nat Commun

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In disaster-prone areas, damaged infrastructure requires impromptu communications leveraging lightweight and adaptive antennas. Accordingly, we introduce a bi-stable deployable quadrifilar helix antenna that passively reconfigures its radiation characteristics in terms of pattern and polarization. The proposed structure is composed of counter-rotating helical strips, connected by rotational joints to allow a simultaneous change in the helix height and radius. Each helical strip is composed of a fiber-reinforced composite material to achieve two stable deployed states that are self-locking. The reconfiguration between an almost omnidirectional pattern and a circularly polarized directive pattern enables the antenna to be suitable for both terrestrial and satellite communication within the L-band. More specifically, the presented design in infrastructure-less areas achieves satellite localization with directive circularly polarized waves and point-to-point terrestrial connectivity with an almost omnidirectional state. Hence, we present a portable, agile, and passively reconfigured antenna solution for low-infrastructure areas.

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Section: Discussionmentioning

confidence: 99%

A multi-stable deployable quadrifilar helix antenna with radiation reconfigurability for disaster-prone areas

Bichara,

Costantine,

Tawk

et al. 2023

Nat Commun

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“…A dualband spiral printed QHA was presented in [6], which is miniaturized by inserting dielectric loading inside the helix, covering the radiation elements with dielectric sealants and turning the radiation elements into the form of parallelogram spirals. In [7], a pattern reconfigurable circularly polarized QHA was presented. By controlling the phase between two composed bifilar helices, it can generate cardioid patterns toward both ends, vertical toroid patterns in different orientations and mixed patterns of cardioid and toroid at several global navigation satellite system (GNSS) bands.…”

Section: Introductionmentioning

confidence: 99%

Design of Miniaturized Dual-Mode Antenna for Handset Terminal Communication

Zhang

Shi

Zhang

et al. 2023

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents a miniaturized dual-mode handset antenna design. A quadrifilar helix antenna (QHA) is utilized to work at higher band (1980-2010 MHz and 2170-2200 MHz) with circular polarization. By cutting off a circular slot on the outer conductor of the QHA feedline and introducing four quarter-wavelength short-circuited stubs, the QHA radiator and its feedline can also work as a monopole antenna at lower band (440-560 MHz) with linear polarization. With this radiator-sharing technique, the dual-mode characteristics can be achieved utilizing only a QHA; therefore, the antenna dimension can be reduced remarkably since it is unnecessary to design an additional monopole antenna. Moreover, the short-circuited stubs are designed with stripline and integrated with the one-to-four power divider and phase shifter for further miniaturization. The measured S11 is less than -8 dB. The typical gain is higher than 0.5 dBi at lower band and 2.5 dBi at higher band. The AR of the QHA is better than 1.3 dB, and the head SAR values are much lower than the international standard at both lower and higher bands. The proposed miniaturized dual-mode antenna can be applied to portable handsets to realize the intercom and satellite communications.

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“…A very low-profile end fire planar helical antenna with 34% of AR bandwidth is reported in [5]. The quadrifilar helical antennas constructed on a poly-amide substrate and PLA substrate are reported in [6,7]. Besides the helical antenna, a dipole antenna is also constructed using wood-based PLA and silver nano-particle ink [8].…”

Section: Introductionmentioning

confidence: 99%

3D Printed Low Profile Strip-based Helical Antenna

Ghosh¹,

Harackiewicz²

2022

PIER C

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A copper strip and conductive paint-based low profile stripped helical antenna for circular polarization over wide axial-ratio (AR) bandwidth are presented. Impacts of strip widths and geometric parameters of the helix on antenna performance (impedance bandwidth, reflection coefficient, AR, gain) are analyzed thoroughly. In terms of performance parameters, the proposed design is also compared with traditional designs of wire and strip-based helical antennas. Proper impedance matching in the proposed design is achieved by the non-conformal placement of the strip. For easing the fabrication complexity, the antenna is again simulated with a dielectric-based supportive structure, and the impact of this additional support is discussed. The antenna is then constructed on a 3D printed polylactic acid (PLA) based structure. Finally, the 1.3-turn strip-based helical antenna with a radius of 18 mm provided impedance and 3-dB AR bandwidths of 99% and 82.52%, respectively. The maximum gain of 9.40 dBi was found at 2.05 GHz in 3-dB AR bandwidth. The height of the presented antenna is 0.35 λ 0 , where λ 0 is the free space wavelength at the frequency of 2.65 GHz. Low profile and wide AR bandwidth facilitate the use of this antenna in space communication.

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A Pattern Reconfigurable Circularly Polarized Quadrifilar Helix Antenna Through Phase Control

Cited by 10 publications

References 25 publications

A multi-stable deployable quadrifilar helix antenna with radiation reconfigurability for disaster-prone areas

A multi-stable deployable quadrifilar helix antenna with radiation reconfigurability for disaster-prone areas

Design of Miniaturized Dual-Mode Antenna for Handset Terminal Communication

3D Printed Low Profile Strip-based Helical Antenna

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