Directivity of planar array feeds for satellite reflector applications

Rahmat-Samii, Y.; Lee, Shung-Wu

doi:10.1109/tap.1983.1143061

Cited by 77 publications

(33 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The radiated field of each element is represented by a method of cosine tapers [19], which gives closed-form expressions for the directivity of a planar array with arbitrary element locations and excitation identical patterns approximated by cosine functions, identical orientations and polarizations [2]. The elemental radiationĒ mn (r) of the mn th element located atr = (x mn , y mn , 0) is modelled by Equation (1)…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The radiation pattern for the y polarized element is also given in [19]. The shape of the radiation pattern is controlled by indices (t 1 , t 2 ).…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The shape of the radiation pattern is controlled by indices (t 1 , t 2 ). These values are obtained by equating Equation (2) to the actual elements radiation pattern obtained from either experimental measurements or by numerical simulations [19].…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The phase term θ β τ is expressed in Equation (19). τ = qM s +b, where 0 ≤ b ≤ M s − 1, number of the subarrays.…”

Section: Beamwidth Controlmentioning

confidence: 99%

See 3 more Smart Citations

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Vani¹,

Subhashini²

2018

PIER B

View full text Add to dashboard Cite

Abstract-This paper devises a framework of phased array antennas to radiate multiple beams for a fixed coverage. The phased antenna array is chosen so that the beamforming can be fixed in selected coverage area. The antenna arrays are employed with a Butler matrix (BM) to form required phases of excitation coefficients to the radiating elements. Optimally designed 4 × 4 or 8 × 8 Butler matrix is utilized at the I/O ports of the phased antenna array. The grating lobes are reduced by using the principle of orthogonality to the feeds of subarray (group of column arrays of phased array). This article also exploits the concept of skirt elements to reach the desired coverage area while reducing the beam overlapping in the restricted area. Simulation studies highlight the proposed claims with elaborated numerical analysis of different case studies.

show abstract

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The radiation pattern for the y polarized element is also given in [19]. The shape of the radiation pattern is controlled by indices (t 1 , t 2 ).…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The phase term θ β τ is expressed in Equation (19). τ = qM s +b, where 0 ≤ b ≤ M s − 1, number of the subarrays.…”

Section: Beamwidth Controlmentioning

confidence: 99%

See 2 more Smart Citations

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Vani¹,

Subhashini²

2018

PIER B

View full text Add to dashboard Cite

show abstract

“…In this paper, we solve this problem by using a method of joint transceiving by composi¬ting beams for satellite systems. Recently, many scholars have studied the DBF algorithm and used it in many fields like adaptive beamforming, smart antennas and multibeam satellites in [4]- [10]. In these researches, the least mean square algorithm is considered to be an ideal algorithm which can be extended and used for the purpose of this paper.…”

Section: Introductionmentioning

confidence: 99%

Joint transceiving scheme for multi-beam GEO satellite communications system

Gao

Tan

Xiang

et al. 2014

16th International Conference on Advanced Communication Technology

View full text Add to dashboard Cite

Abstract-In multi-beam satellite communication systems, users suffer from 3dB power attenuation in beam-edge area. This problem also exists in terrestrial cellular network. To solve this problem, terrestrial system employs joint transceiving that makes adjacent cells transmit signals together. The purpose of this paper is to propose a method of joint transceiving by compositing beams for satellite systems. The equal-gain combination algorithm is presented to simplify beams from component beams. Then we propose a joint transceiving scheme based on component beams based on a simplified processing algorithm. Simulation results show that SIR of users in beamedge increases by 6dB when using the joint transceiving scheme.

show abstract

Multibeam Antennas

Balling¹

2005

Encyclopedia of RF and Microwave Engineering

View full text Add to dashboard Cite

The article introduces multibeam antennas by reviewing a number of applications describing their importance for modern radar and communications systems. Simple aperture distributions and antenna sizing formulas for beamwidth and gain rolloff are discussed, and examples are provided on the implementation of both active and passive multibeam antennas using different beamforming technologies. The problem of forming simultaneous multiple beams from a common aperture is investigated considering the Stein limits for passive antennas. The implementation of optimum beamforming networks is discussed. Both array antennas and array‐fed reflector antennas, including dual‐ and multimode antenna systems, are reviewed. The design of multibeam reflector antenna systems is considered in detail. Scan aberrations and cross‐polarization effects of the signal‐offset reflector are quantified, describing means to improve the antenna performance. The potential of compensated dual‐offset reflectors, including front‐fed and side‐fed offset Cassegrain antennas for large scan angles, is demonstrated.

show abstract

Directivity of planar array feeds for satellite reflector applications

Cited by 77 publications

References 10 publications

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Joint transceiving scheme for multi-beam GEO satellite communications system

Multibeam Antennas

Contact Info

Product

Resources

About