Interleaved Array Antennas for FMCW Radar Applications

Lager, Ioan E.; Trampuz, Christian; Simeoni, M.; Ligthart, L.P.

doi:10.1109/tap.2009.2024573

Cited by 41 publications

(41 citation statements)

References 7 publications

(1 reference statement)

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“…An antenna array that is made to generate multiple radiation patterns is useful in many applications, such as surveillance and tracking in radar systems [1,2], military, satellite [3] and cellular communication [4]. In communication systems, same or different shaped multiple patterns are used adaptively to maintain a reliable wireless link in the presence of jammers or interference signal.…”

Section: Introductionmentioning

confidence: 99%

“…Multiple beams of antenna arrays are properly handled to serve the required services with the advantages of reduced design complexity, cost and weight of the antenna. Consequently, various methods, such as switchable [4], reconfigurable [5,6], and interleaved [2,7], have been effectively utilized to generate multiple power patterns in CAAs. Since the complexity in implementing the feed network becomes more when the element excitations for the different patterns differ both in amplitude and phase than if the element excitations differ only in phase.…”

Section: Introductionmentioning

confidence: 99%

“…However, in this method, only one beam is active at any instant of time. At this juncture, interleaved array is used successfully in some radar based applications [2,7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Simultaneous Multiple-Harmonic-Patterns in Time-Modulated Linear Antenna Arrays

Mandal¹,

Mahanti²,

Ghatak³

2014

PIER M

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Abstract-In time-modulated antenna arrays (TMAAs), as a result of periodical switch-on and switchoff of the antenna elements, including operating frequency (termed as center frequency) signal, sideband signals are appeared at either sides of the center frequency in integer multiples of the modulation frequency. In this paper, it is shown that without using phase shifters, just by suitably controlling the on-time instants (OTIs) and on-time durations (OTDs) of a time-modulated linear antenna array (TMLAA) elements, simultaneously, along with a pencil beam pattern at the operating frequency, a shaped beam pattern can be obtained at both the first positive and negative harmonics of the timemodulation frequency. The important advantage of such a technique is that realization of multi-beam pattern in conventional antenna array (CAA) system generally requires complex feed network, whereas by using simple radio frequency (RF) switching circuit in the feed network of TMLAA, by virtue of the properties of harmonic radiations, synthesis of a shaped pattern at either (positive or negative) harmonic results in generating the same pattern in its opposite harmonic, and the synthesized patterns at different harmonics can be simultaneously used as independent communication channels. By employing a differential evolution (DE) based optimization method, numerical results for a 16-element TMLAA with uniform excitation show that in conjunction with a pencil beam pattern at the center frequency, a flat-top or a cosec square pattern at first positive and negative sidebands of side-lobe levels (SLL) −20 dB can be synthesized by suppressing the higher sideband level (SBL) to below −10 dB.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Simultaneous Multiple-Harmonic-Patterns in Time-Modulated Linear Antenna Arrays

Mandal¹,

Mahanti²,

Ghatak³

2014

PIER M

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“…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.

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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.

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“…Multi-function arrays have several applications in radar systems since they allow lower costs, reduced power consumptions, and simplified architectures with respect to traditional multiple antenna layouts [1]- [4]. However, the design of shared aperture arrays is more complex than that of traditional architectures due to the enlarged number of degrees of freedom as well as the arising mutual constraints [4].…”

Section: Introductionmentioning

confidence: 99%

Low sidelobe ADS-based arrays for FMCW radar

Rocca

Donelli

2011

2011 IEEE International Symposium on Antennas and Propagation (APSURSI)

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A fully analytical technique for concurrently designing the transmit and receive antennas of frequency-modulated continuous-wave (FMCW) radars is proposed. The approach is based on the interleaving of two sub-arrays according to a binary sequence derived from almost difference sets (ADSs). Thanks to the ADS autocorrelation properties, controllable sidelobes are achieved for the overall radiating systems. A set of preliminary numerical results is provided to assess the effectiveness and potentialities of the method.

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Interleaved Array Antennas for FMCW Radar Applications

Cited by 41 publications

References 7 publications

Synthesis of Simultaneous Multiple-Harmonic-Patterns in Time-Modulated Linear Antenna Arrays

Synthesis of Simultaneous Multiple-Harmonic-Patterns in Time-Modulated Linear Antenna Arrays

Improved Seeding Schemes for Interleaved Thinned Array Synthesis

Low sidelobe ADS-based arrays for FMCW radar

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