Designing a 32 element array at 76GHz with a 33dB taylor distribution in waveguide for a radar system

Anthony, Theodore K.; Zaghloul, Amir I.

doi:10.1109/aps.2009.5172133

Cited by 12 publications

(6 citation statements)

References 2 publications

(1 reference statement)

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“…However, the use of such power distribution components is associated with degraded reflection responses of the feeds, stronger coupling effects, increased sensitivity of the entire antenna-feed structure to manufacturing tolerances, as well as degraded radiation pattern of the array [3,4], in particular, due to non-decoupling of the outputs and increased reflection (from the higher-impedance output) [8]. CFs realising predefined non-uniform amplitude excitations of certain linear antenna arrays have been demonstrated for microstrip/stripline [3,9] and waveguide [10] technologies; however, the choice and optimality of the implemented CF architectures was not clarified. At the same time, an importance of full-wave electromagnetic (EM) simulations for tuning and validation has been demonstrated [3,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Systematic approach to sidelobe reduction in linear antenna arrays through corporate‐feed‐controlled excitation

Ogurtsov

Koziel

2017

IET Microwaves, Antennas & Propagation

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A systematic approach to sidelobe reduction of broadside linear antenna arrays by design of corporate feeds implementing non‐uniform excitation is proposed. The approach comprises of the two major stages. First, candidate excitation sets (corporate feeds) are searched among excitation sets which might energize a particular array aperture. The range of the corporate networks is restricted – based on the implementation and performance considerations – to the ones constructed using only T‐junctions with equal power split. The reference for the candidates in terms of the sidelobe level is the uniformly excited and spaced array aperture with the same number of elements. The search is performed over realizable excitations and constrained elements’ spacings using the array factor and the model of excitation amplitudes due to corporate feeding. At the second stage, an excitation providing reduced sidelobes and simple routing is implemented as a microstrip corporate feed within the antenna array model. The entire antenna‐feed circuit is adjusted and validated using numerical optimization and discrete electromagnetic simulations at the high‐fidelity level of description. The proposed feeds and the approach to their systematic design offer flexibility in design of linear antenna arrays without extra complications and allow substantial sidelobe reduction. A demonstration example is provided.

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Section: Introductionmentioning

confidence: 99%

Systematic approach to sidelobe reduction in linear antenna arrays through corporate‐feed‐controlled excitation

Ogurtsov

Koziel

2017

IET Microwaves, Antennas & Propagation

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“…The 2nd and 3rd stages are composed of unequal T-junction power splitters to achieve the required aperture distribution. The latter are combined with H-plane bends that are used to compensate different delays generated by the imbalanced power splitting [32]. The last stage divides the power evenly through the Y-junction splitters.…”

Section: A 16-way Power Dividermentioning

confidence: 99%

Three-Dimensional Architecture of Substrate Integrated Waveguide Feeder for Fermi Tapered Slot Antenna Array Applications

Khatib

Djerafi

2012

IEEE Trans. Antennas Propagat.

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A class of three-dimensional planar arrays in substrate integrated waveguide (SIW) technology is proposed, designed and demonstrated with 8 16 elements at 35 GHz for millimeter-wave imaging radar system applications. Endfire element is generally chosen to ensure initial high gain and broadband characteristics for the array. Fermi-TSA (tapered slot antenna) structure is used as element to reduce the beamwidth. Corrugation is introduced to reduce the resulting antenna physical width without degradation of performance. The achieved measured gain in our demonstration is about 18.4 dBi. A taper shaped air gap in the center is created to reduce the coupling between two adjacent elements. An SIW H-to-E-plane vertical interconnect is proposed in this three-dimensional architecture and optimized to connect eight 1 16 planar array sheets to the 1 8 final network. The overall architecture is exclusively fabricated by the conventional PCB process. Thus, the developed SIW feeder leads to a significant reduction in both weight and cost, compared to the metallic waveguide-based counterpart. A complete antenna structure is designed and fabricated. The planar array ensures a gain of 27 dBi with low SLL of 26 dB and beamwidth as narrow as 5.15 degrees in the E-plane and 6.20 degrees in the 45 -plane.Index Terms-E-plane corner, sidelobe level (SLL), substrate integrated waveguide (SIW), tapered slot antenna (TSA).

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“…The receive antenna array is composed of 32-elements fed with a waveguide power divider designed to produce a 33dB Taylor distribution across the array aperture [2], [3]. The overall configuration is shown in Figure 2, and measures 0.5" (height) X 7.0" (width) X 5.0" (depth).…”

Section: Figure 1 Block Diagrammentioning

confidence: 99%

“…This, however, does not compromise the side-lobe requirement within the operating scanning range of + 15 degrees that is needed for the collision avoidance system. Detailed analysis and HFSS simulations of the design and power divider matching are included in [2] and [3] with the fabrication, measurements and characterization of the antenna. The antenna design shown in Figure 2 was fabricated as a fully integrated horn array and 5-stage power divider.…”

Section: Figure 1 Block Diagrammentioning

confidence: 99%

Detection in collision avoidance radar using active versus passive phased arrays

Zaghloul¹,

Wellman²,

Anthony³

2010

2010 IEEE International Symposium on Phased Array Systems and Technology

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This paper presents two designs for phased arrays for collision avoidance radar operating at the 76 GHz band. The two designs for the antenna use a linear waveguide horn array that is fed with a waveguide powerdividing network and is tapered to produce low side-lobe levels for low-error detection. The taper is based on a 40-dB Taylor distribution. The first design uses passive phased arrays that are stacked and bore-sighted in different directions to produce scanned beams through switching. The second design uses a single phased array with MEMS phase shifters embedded in the last stage of the waveguide power divider. The phase shifters are integrated with the help of MIC/MMIC-to-waveguide or waveguide-tocoplanar-waveguide (CPW) transitions that are housed in the waveguide sections that feed the array elements. The antenna and detection system measurement results of the passive array design are presented, along with the simulation results of the active array design.

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Designing a 32 element array at 76GHz with a 33dB taylor distribution in waveguide for a radar system

Cited by 12 publications

References 2 publications

Systematic approach to sidelobe reduction in linear antenna arrays through corporate‐feed‐controlled excitation

Systematic approach to sidelobe reduction in linear antenna arrays through corporate‐feed‐controlled excitation

Three-Dimensional Architecture of Substrate Integrated Waveguide Feeder for Fermi Tapered Slot Antenna Array Applications

Detection in collision avoidance radar using active versus passive phased arrays

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