Design Aspects of a Compact Dual Band Feed Using Dielectric Rod Antennas With Multiple Element Monopulse Tracking

Kumar, Chandrakanta; Kumar, V. Senthil; Srinivasan, V. V.

doi:10.1109/tap.2013.2271312

Cited by 19 publications

(10 citation statements)

References 7 publications

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“…Dual reflector antennas, such as Cassegrain reflector antenna and Gregorian reflector antenna, have been widely used in applications as satellite communication, tracking radar and radio telescope 1,2 due to their excellent performances, such as high directivity, low cross polarization level, and simple structure. However, they suffer from several drawbacks, such as poor reflection coefficient, blockage of support structure, and large sub‐reflector required 3 .…”

Section: Introductionmentioning

confidence: 99%

A new phase efficiency calculation model for optimization of a hat‐fed reflector antenna with arbitrary radius of ring‐shaped phase center

Cai

Yan

et al. 2020

Int J RF Microw Comput Aided Eng

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A hat-fed reflector antenna with large radius of ring-shaped phase center (RSPC) is reported in this article. First, a new phase efficiency calculation model (PECM) based on new phase reference point is presented, which can accurately calculate the phase efficiency of a hat-fed with arbitrary radius of RSPC. Second, based on the invented PECM, the hat-fed can be optimized by using cosimulation method of HFSS and MATLAB, high aperture efficiencies are achieved in the whole band. To prove the validity of the new PECM, a hatfed reflector antenna with large radius of RSPC is designed, manufactured, and measured. The measured results are in good agreement with the simulations. The results show that the developed hat-fed reflector antenna has achieved a VSWR of less than 1.18, the peak realized gain of 43.5 dBi and an aperture efficiency of higher than 67.4% in the entire band from 12.25 to 14.5 GHz.

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Section: Introductionmentioning

confidence: 99%

A new phase efficiency calculation model for optimization of a hat‐fed reflector antenna with arbitrary radius of ring‐shaped phase center

Cai

Yan

et al. 2020

Int J RF Microw Comput Aided Eng

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“…The above comparator structures are very complicated requiring extensive design work and high fabrication cost. Monopulse feeds employing four or five dielectric rods have been investigated in [7,8]. Compared to horn-type feeds, they have such advantages as structural simplicity and ease of simultaneous optimization of the sum and difference patterns.…”

Section: Introductionmentioning

confidence: 99%

A New High-Performance Monopulse Feed with a Simple Comparator Network

Jargalsaikhan

Bang²,

Choi

et al. 2019

International Journal of Antennas and Propagation

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This paper presents a new high-performance five-element monopulse feed with a simple comparator network for Cassegrain reflector applications. The radiating element is a tapered dielectric rod fed by a circular waveguide which is in turn excited by a printed dipole. The center element is used for the sum pattern, while top and bottom elements are used for the elevation difference pattern, and left and right elements for the azimuth difference pattern. Out-of-phase excitation for the difference pattern is obtained by antisymmetrically placing two dipoles and combining their outputs with a power combiner. The optimally designed feed has been fabricated and measured. Measurement shows that the feed has the maximum sum pattern gain of 16.8 dBi, the difference pattern null depth of –21 dBi, and the reflection coefficient of less than –10 dB over 13.9–16.7 GHz.

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“…Although this circuit provides a 56-degree field of view and very good results in its operating bandwidth, the structure is complicated since it comprises a mode-former circuit which entails a four-way power splitter including Wilkinson power dividers, four switched-line phase shifters and the stacked circularly polarised antenna array which is composed of four edgefed patches and four parasitic patches. A high gain 2 × 2 array using multiple horns and dielectric rods is designed in [5] for tracking applications, covering a field of view of about 14°. A waveguide slot array antenna, which includes 820 slots and four centre-fed sub arrays, is presented in [6].…”

Section: Introductionmentioning

confidence: 99%

Frequency‐selective substrate integrated waveguide front‐end system for tracking applications

Hesari

Børnemann

2018

IET Microwaves, Antennas & Propagation

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A K-band frequency-selective front-end system for monopulse tracking applications is presented on a single layer of a substrate-integrated waveguide (SIW). The circuit comprises an antenna array of two Vivaldi antennas, a frequency-selective power combiner, and two frequency-selective SIW crossovers, which eliminate the need for subsequent filtering. Its performance is demonstrated in terms of sum and difference patterns, gain, and scattering parameters. In order to validate the design procedure, the monopulse tracking front end is fabricated and measured. It has a bandwidth of 540 MHz with an operating frequency range of 23.63-24.17 GHz. The sum and difference patterns are provided by in-phase and out-of-phase electric fields. The maximum achievable gain is 6.2 dB at the mid-band frequency, and a 30-degree field of view is obtained. The measurements are found to be in good agreement with simulations.

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Design Aspects of a Compact Dual Band Feed Using Dielectric Rod Antennas With Multiple Element Monopulse Tracking

Cited by 19 publications

References 7 publications

A new phase efficiency calculation model for optimization of a hat‐fed reflector antenna with arbitrary radius of ring‐shaped phase center

A new phase efficiency calculation model for optimization of a hat‐fed reflector antenna with arbitrary radius of ring‐shaped phase center

A New High-Performance Monopulse Feed with a Simple Comparator Network

Frequency‐selective substrate integrated waveguide front‐end system for tracking applications

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