Compact Dual Circularly Polarized Primary Feeds for Symmetric Parabolic Reflector Antennas

Mehrabani, Ali M.; Shafai, L.

doi:10.1109/lawp.2015.2481363

Cited by 15 publications

(5 citation statements)

References 8 publications

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“…This ensures compact and lightweight form factors as it can be seen, for example, in several frequency-modulated continuous wave radar kits [10][11][12], where simple linear arrays of microstrip patch antennas are employed. Some examples of parabolic reflector antenna design at micro and millimetre waves can be found in the literature [5,19,[20][21][22][23][24]. In particular, the authors in [21] and further in [22] have suggested a compact parabolic reflector design, using several layers of substrate stacked together, forming a quasiplanar parabolic dish.…”

Section: Introductionmentioning

confidence: 99%

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Compact 3D‐printed reflector antenna for radar applications at K‐band

Reis

Ribeiro

Caldeirinha

2021

IET Microwaves Antenna & Prop

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A compact parabolic reflector antenna aiming at radar applications in the K‐band is presented. It is mainly composed of a thermoplastic material and using classical additive techniques (also known as 3D printing), the proposed high‐gain antenna exhibits a novel and unique form factor, particularly of interest for applications with low payload capacity, for example unmanned aerial vehicles. The antenna is composed of four parts: (i) a paraboloid shape embodied in a supporting polylactic acid (PLA) material; (ii) a metallic coating applied to the paraboloid surface of (i), to enable it with electromagnetic reflecting properties; (iii) a PLA spacer that ensures the physical separation (i.e. focal distance) between parts (i) and (iv) and, finally, (iv) a microstrip patch antenna with a reduced ground plane to reduce feed blockage. Subsequently to an overview on the theoretical formulation of parabolic reflector antennas, an antenna targeting 20 dBi and a minimum bandwidth of 500 MHz operating in the 24 GHz ISM radar band have been dimensioned, optimised in CST Microwave Studio and validated against measurements performed on a physical prototype. The simulation and experimental results are in good agreement with the prototype yielding 18.3 dBi of gain and 2.2 GHz of useful bandwidth, clearly demonstrating the potential of the proposed antenna design.

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Section: Introductionmentioning

confidence: 99%

“…Some examples of parabolic reflector antenna design at micro and millimetre waves can be found in the literature [5, 19, 20–24]. In particular, the authors in [21] and further in [22] have suggested a compact parabolic reflector design, using several layers of substrate stacked together, forming a quasi‐planar parabolic dish.…”

Section: Introductionmentioning

confidence: 99%

Compact 3D‐printed reflector antenna for radar applications at K‐band

Reis

Ribeiro

Caldeirinha

2021

IET Microwaves Antenna & Prop

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“…However, there is a big obstacle for them to be used for mm-wave band due to their huge losses for large arrays. Conversely, notable efforts have been made in the past to achieve dualpolarized antennas using other solutions, such as parabolic reflectors [7]- [8], reflectarrays [9]- [11], lenses [12]- [13], waveguide arrays [14]- [15], planar structures [16] or leaky-wave antennas [17]. These type of antennas are widely developed and studied, and they can meet some of the SATCOM on-themove requirements.…”

Section: Introductionmentioning

confidence: 99%

$8\times8\,\,Ka$ -Band Dual-Polarized Array Antenna Based on Gap Waveguide Technology

Ferrando-Rocher

Herranz-Herruzo

Valero‐Nogueira

et al. 2019

IEEE Trans. Antennas Propagat.

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This paper describes an 8×8 fully-metallic highefficiency dual-polarized array antenna working at Ka-band, based on Gap Waveguide concept. The radiating element is a circular aperture backed by two stacked cylindrical cavities, which are fed orthogonally to achieve a dual-polarized performance. Both feeding layers consist of a gap waveguide corporate network to reach all the cavities backing each radiating element. Cavities are naturally integrated within the bed of nails hosting grooves and ridges for guiding EM field, leading to a low-profile dualpolarized array in Ka-band. Experimental results present good agreement with simulations. Measured radiation patterns agree well with simulation and the antenna provides an average gain over 27 dBi within its operating bandwidth (29.5 to 31 GHz).

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“…Broadband dual CP antennas can be transformed from conventional broadband CP antennas. With reference to spiral antennas, many configurations have been designed for dual circular polarization at the expense of degraded array efficiency due to a halved effective use of space [1,2], sacrificing gain by the resister load [3], and complex, bulky feeding networks [4,5]. Helix is another traditional broadband CP antenna and dual circular polarization can be generated through two ports in both ends, but orthogonal polarization operates at separate bands [6].…”

Section: Introductionmentioning

confidence: 99%

Broadband Dual Circularly Polarized Magnetoelectric Dipole Antenna Fed by a Miniaturized Six-Branch Hybrid Coupler

Zhang

Liang

Geng

et al. 2016

International Journal of Antennas and Propagation

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A broadband dual circularly polarized magnetoelectric dipole antenna (MEDA) fed by a miniaturized six-branch hybrid coupler (SBHC) is presented in this paper. First, a dual linearly polarized MEDA with a bandwidth of 73.3% is developed based on the previous design with a bandwidth of 52%. The SBHC, with a miniaturized size of 53%, is designed on a printed circuit board underneath the ground of the MEDA, which possesses an efficient bandwidth of 80.7% to generate the antenna for dual circular polarization. Measurement results show that the proposed dual circularly polarized MEDA achieves an impedance bandwidth of 84.5%, an axial-ratio bandwidth of 81.8%, and a nearly symmetrical, stable unidirectional radiation pattern with an average gain of 8 dBic over its impedance bandwidth.

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Compact Dual Circularly Polarized Primary Feeds for Symmetric Parabolic Reflector Antennas

Cited by 15 publications

References 8 publications

Compact 3D‐printed reflector antenna for radar applications at K‐band

Compact 3D‐printed reflector antenna for radar applications at K‐band

$8\times8\,\,Ka$ -Band Dual-Polarized Array Antenna Based on Gap Waveguide Technology

Broadband Dual Circularly Polarized Magnetoelectric Dipole Antenna Fed by a Miniaturized Six-Branch Hybrid Coupler

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