A Novel Dual-Mode Dual-Polarized Circular Waveguide Feed Excited by Concentrically Shorted Ring Patches

Pour, Z. Allahgholi; Shafai, L.

doi:10.1109/tap.2013.2274207

Cited by 14 publications

(7 citation statements)

References 8 publications

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“…Mode pattern responsible for dual polarization performance of proposed antenna is studied under this section. Mode suppression techniques to achieve dual polarization are reported in different antennas such as Dielectric Resonator Antennas fed by two pairs of differential probes, Reflector Antennas fed by multi‐port circular waveguide and offset reflector antenna with dual ports . In the proposed quasi‐pentagonal slot CPW antenna, the mode suppression can be achieved through single port by controlling the impedance transformation between the feed line and aperture of the antenna.…”

Section: Antenna Design and Analysismentioning

confidence: 99%

Mode investigation of parasitic annular ring loaded dual band coplanar waveguide antenna with polarization diversity characteristics

Madaka

Muthusamy

2020

Int J RF Microw Comput Aided Eng

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This document presents a dual band dual polarized coplanar waveguide (CPW) antenna with single port feed. Lower resonating band is circular polarized, while the upper band is linear polarized. A novel concept of realizing dual polarization by suppressing the undesired modes is introduced in this work. Orthogonal Even/Odd modes are excited at lower band and a phase difference of 90° is maintained between them. Hence, circular polarization behavior is realized for lower operating band. For upper band, Odd mode is suppressed by introducing step shaped modifications in the ground plane at left side of the feed line, resulting in linear polarized upper band. Dual band nature of the antenna is confirmed by 10 dB impedance bandwidth extending from 3.91‐5.31 GHz to 7.51‐8.72 GHz. Circular polarized nature of lower band is confirmed by enclosure of lower band by 3 dB axial ratio bandwidth extending from 4.01 to 5.59 GHz. Advantages of proposed antenna involves the use of single port feed for generating dual polarization performance along with compact antenna size.(30 × 30 × 1.6 mm3).

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Section: Antenna Design and Analysismentioning

confidence: 99%

Mode investigation of parasitic annular ring loaded dual band coplanar waveguide antenna with polarization diversity characteristics

Madaka

Muthusamy

2020

Int J RF Microw Comput Aided Eng

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“…The first part of this review is devoted to the required methodology in a single large aperture [3][4][5] as well as feed properties to implement such an adaptive aperture in the form of virtual array antenna. Dual-mode primary feeds with polarization diversity [6] are utilized, which lead to an electronically controlled phase center location within a single large aperture in two orthogonal directions. Both symmetric and offset configurations will be presented.…”

Section: Structure Of the Presentationmentioning

confidence: 99%

Some novel properties of asymmetric adaptive medium to large aperture antennas

Pour

Shafai

2014

2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)

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The talk will focus on intriguing properties of asymmetrical adaptive large and medium aperture antennas. Several adaptive medium size antennas will be discussed to demonstrate their attractive potentials as primary feeds. First, an adaptive virtual array is realized in a single large aperture antenna such as a parabolic reflector. Both symmetric and offset reflector structures will be addressed. Second, the realization of frequency re-use antennas is explained through the use of adaptive matched primary feeds in asymmetrical offset reflectors. The electromagnetic requirements to attain such distinctive features will be fully explained.

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“…Various matched feed structures are recently reported for this purpose. For example, an adaptive dual-mode dual-polarized (TE ) circular matched feed structure is reported as a wideband conjugate matched performer for an offset reflector antenna in [2], and six SMA connectors are attached with it to control the polarization as well as excited power of desired modes of the matched feed. A new kind of aperture, which is an intersection of circle and rectangle, is used for wideband matched feed designed employing the two operating modes having close cutoff wavenumber where x-polarized TE mode as a main operating mode and conjugate mode as a TM mode are reported by the present authors in [3].…”

Section: Introductionmentioning

confidence: 99%

Wideband Matched Feed Design Employing Conjugate Field Radiated From a Square Choke Excited by Two Slots on a Diagonal Waveguide

Bhattacharjee¹

2018

PIER M

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Abstract-A simple and compact diagonal matched feed structure is proposed for offset reflector antenna, which includes a square choke to radiate the desired conjugate mode (TE 4 : a higher order rectangular coaxial cable mode) for suppressing the cross-polar power of an offset reflector antenna when the reflector is illuminated by the dominant diagonal mode (TE D V : a linear combination of rectangular TE 01 and TE 10 modes) radiated from the aperture of a central diagonal waveguide. Square choke is excited by two identical slots on the central diagonal waveguide using the longitudinal magnetic field of main operating mode TE D V . Wideband conjugate matching as well as impedance matching for broadband operation can be achieved by such radiating main mode and conjugate mode from apertures which are spatially separated. Based on the above configuration, a J-band matched feed structure is designed using HFSS software for a given offset reflector geometry. The proposed matched feed structure is fabricated and measured. The measured results are compared with simulated ones, and close agreements are found.

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A Novel Dual-Mode Dual-Polarized Circular Waveguide Feed Excited by Concentrically Shorted Ring Patches

Cited by 14 publications

References 8 publications

Mode investigation of parasitic annular ring loaded dual band coplanar waveguide antenna with polarization diversity characteristics

Mode investigation of parasitic annular ring loaded dual band coplanar waveguide antenna with polarization diversity characteristics

Some novel properties of asymmetric adaptive medium to large aperture antennas

Wideband Matched Feed Design Employing Conjugate Field Radiated From a Square Choke Excited by Two Slots on a Diagonal Waveguide

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