The Design of Shared Aperture Antennas Consisting of Differently Sized Elements

Coman, C.I.; Lager, Ioan E.; Ligthart, L.P.

doi:10.1109/tap.2005.863382

Cited by 57 publications

(21 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The MMM yields a Generalized Admittance Matrix (GAM) representation of the electromagnetic coupling, as detailed by Bird [1990] and Bird and Bateman [1994]. The computational engine described by Coman et al [2006] is employed in this work for the evaluation of the total radiated fields.…”

Section: Effect Of the Mutual Couplingmentioning

confidence: 99%

Implementation of polarization agility in planar phased‐array antennas by means of interleaved subarrays

Simeoni

Lager

Coman³

et al. 2009

Radio Science

View full text Add to dashboard Cite

[1] A method for ensuring polarization agility in conjunction with beam steering in planar array antennas is proposed. It relies on interleaving two subarrays with orthogonal, linear polarizations that, together, can generate arbitrary polarization states: adjustable linear, elliptical, and left-or right-handed circular. The complexity of the resulting system is comparable with that of standard, fully populated array antennas consisting of identical, linearly polarized elements. By dynamically controlling the amplitude and the phase of the signals fed to the subarrays, a stable polarization state can be maintained during beam steering. The concept is validated by numerically investigating an architecture obtained by interleaving nonuniform subarrays designed by means of a deterministic placement strategy. The effects of the mutual coupling between the different radiating elements are modeled and discussed.Citation: Simeoni, M., I. E. Lager, C. I. Coman, and A. G. Roederer (2009), Implementation of polarization agility in planar phased-array antennas by means of interleaved subarrays, Radio Sci., 44, RS5013,

show abstract

Section: Effect Of the Mutual Couplingmentioning

confidence: 99%

Implementation of polarization agility in planar phased‐array antennas by means of interleaved subarrays

Simeoni

Lager

Coman³

et al. 2009

Radio Science

View full text Add to dashboard Cite

show abstract

“…The common bands for space borne SARs are the L, S, C, and X-bands. To minimize the volume and weight of the SAR antenna, a shared aperture configuration for dual-or multi-bands are required, which will share the sub-systems behind the arrays [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. A shared aperture antenna SAA in L-and C-bands is proposed by Pokuls et al in [2] to fill the gap of shared aperture antenna technology using multilayer, which uses slots in the L-band and interlaced with microstrip patches operating in the C-band.…”

Section: Introductionmentioning

confidence: 99%

“…In 2001, Karmakar et al [4] described a photonics bandgap (PBG) assisted SAA for very small aperture terminals (VSAT) applications operating at S/X 3.8 and 6.28 GHz using a 3-layer configuration. Differently sized radiating elements were presented in [5], to increase the total bandwidth and reduce the mutual coupling between the radiators interleaved on a common aperture. Zhong et al [6] proposed a triple-band dual-polarization (TBDP) L/S/X-bands with frequency ratio of 1 : 2.8 : 8, which had a 5-layer configuration.…”

Section: Introductionmentioning

confidence: 99%

A Single Layer S/X-Band Series-Fed Shared Aperture Antenna for Sar Applications

Kothapudi¹,

Kumar²

2017

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents our research work on designing a dual-band dual-polarized (DBDP) series-fed S/X-band shared aperture antenna (SAA) for synthetic aperture radar (SAR) applications. The proposed SAA DBDP X-band antenna is designed with the concept of series-fed 4-group 2 × 2 planar arrays with high impedance microstrip line feeding in both vertical and horizontal polarizations. By etching out the inner edge elements from 2 × 2 X-band subarrays in all the four-groups, the Sband element could be accommodated. The design evolution stages have been presented. The S-band (3.2 GHz) is best suited for volumetric soil moisture estimation using SAR and X-band (9.3 GHz) best suited for surveillance SAR applications and grain size estimation. To verify the antenna design concept, a prototype is fabricated and measured with both S-parameters and radiation characteristics including gain measurements. The antenna with reflection coefficient |S 11 | < −10 dB has an impedance bandwidth 3.12-3.42 GHz (9.3% BW) in S-band and 9.2-9.36 GHz (1.72% BW) in X-band. The measured isolation lS21l between two different bands in the same polarization is better than 25 dB, and the isolation between two different bands in two orthogonal ports is better than 30 dB. Measured gain of the antenna at S-band is better than 8.5 dBi at V-port and H-port, and X-band is better than 11 dBi at either port. Measured side-lobe level (SLL) at S-band is better than −17 dB at either port, and X-Band is better than −20 dB at either port. The overall size of the S/X-DBDP SAA is 100 × 100 × 1.6 mm 3 . Measured results of the S/X-DBDP SAA show good agreement with the finite integration technique (FIT) based computer simulation technology (CST) microwave studio.

show abstract

“…Interleaved arrays are antenna arrays where different antenna elements within the array are allocated different functions, thereby achieving multiple functions within a single aperture [2]. Interleaved arrays have been developed to achieve wider operating bandwidths by interleaving differently-sized antenna elements [3], to achieve isolation between a transmitter and receiver in a continuous wave (CW) radar by interleaving transmit and receive elements [4], and to achieve multiple polarisations through the use of antenna elements with differing polarisations [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Improved Seeding Schemes for Interleaved Thinned Array Synthesis

Plessis

Ghannam

2014

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Abstract-This paper considers the synthesis of interleaved antenna arrays with shared and inactive elements. A hybrid genetic algorithm (GA) where the initial population is seeded with good solutions is proposed. A number of seeding schemes are considered and the most effective of these are identified. The proposed algorithm is shown to reliably produce results with sidelobe level (SLL) values which are close to the optimum and to converge faster than the other algorithms considered. However, some of the seeding schemes mislead the GA and actually produce worse results than random initialisation.

show abstract

The Design of Shared Aperture Antennas Consisting of Differently Sized Elements

Cited by 57 publications

References 22 publications

Implementation of polarization agility in planar phased‐array antennas by means of interleaved subarrays

Implementation of polarization agility in planar phased‐array antennas by means of interleaved subarrays

A Single Layer S/X-Band Series-Fed Shared Aperture Antenna for Sar Applications

Improved Seeding Schemes for Interleaved Thinned Array Synthesis

Contact Info

Product

Resources

About