A W-band dielectric-lens-based integrated monopulse radar receiver

Raman, Sanjay; Barker, N. Scott; Rebeiz, Gabriel M.

doi:10.1109/22.739216

Cited by 76 publications

(14 citation statements)

References 12 publications

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“…Phased arrays can be classified into three different architectures, based on the location of the phase shifters: RF, IF and LO phase shifting [11], [12], [13], [14], [15]. For example, in the RF phase shifting architecture, the signals in the various channels are phase-shifted and combined in the RF domain.…”

Section: Nulls -3mentioning

confidence: 99%

A Novel Millimeter-Wave Dual-Fed Phased Array for Beam Steering

Topak

Hasch

Wagner³

et al. 2013

IEEE Trans. Microwave Theory Techn.

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A phased array antenna, used for shaping and steering the main antenna beam electronically to chosen directions within the predefined field of view, has been the key antenna system for satellite communications and military radars for decades. However, despite its high functional performance, it is still a very costly and complex solution for emerging wireless consumer applications such as high speed wireless communication and driving assistance systems due to the number of phase shifters and their complex control circuitry. Even more challenges are encountered with an increase in the number of channels if an antenna with high directivity is desired, such as routing RF and IF circuits, isolation of neighboring RF channels or calibration of a whole system.In order to eliminate the challenges stated above, a novel beam steering approach is presented in this dissertation based on the superposition of two squinted antenna beams. The two antenna beams are realized by exciting the opposite feeds of a dual-fed array antenna. A change in the phase difference and amplitude ratio between the input signals, using only one phase shifter and two variable gain amplifiers or only two I-Q vector modulators, steers the main beam in different directions. Due to its similar architecture, it exhibits all the advantages that a traveling wave antenna possesses as well, such as beam steering with the change of the operating frequency.Additionally, the sum and difference patterns can be obtained using this concept, allowing for an amplitude-comparison monopulse operation with a broad peak or a deep null at the broadside. Using this approach, beam nulls can also be steered towards interference directions, while keeping the shape and direction of the main beam unchanged. Another advantage is its high robustness against phase and amplitude errors due to analog hardware components in the RF path, which cannot be avoided in conventional phased arrays. A channel mismatch and crosstalk between neighbor RF channels or a temperature and time dependent array calibration can be minimized via this technique thanks to its unique topology, as well.In this work, an analytic antenna model has been derived and implemented in MATLAB using closed form expressions to analyze and optimize each relevant antenna parameter. Using this model, the development time becomes significantly shorter and the required computer memory is almost negligible.In order to prove the validity of the proposed novel beam steering approach, two different millimeter-wave (mm-wave) dual-feed antenna setups have been designed and implemented. In the first setup, commercial passive WR-10 components are used to perform the phase and i -iiamplitude changes manually. To demonstrate the full capability of electronic scanning, a second setup is built by employing an I-Q vector modulator instead of the waveguide phase shifter and the attenuator, which is controllable via input current signals. A mm-wave baredie transceiver MMIC which houses an integrated I-Q vector modulator in its ...

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Section: Nulls -3mentioning

confidence: 99%

A Novel Millimeter-Wave Dual-Fed Phased Array for Beam Steering

Topak

Hasch

Wagner³

et al. 2013

IEEE Trans. Microwave Theory Techn.

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“…During the last years, lens antennas have attracted the attention of various researchers and companies because of their potential use in several application fields such as high frequency wireless communication systems [1,2], millimeter wave imaging [3], space [4], smart antennas [5], radioastronomy [6], and radar systems [1]. In particular, in [1] a flat-top radiation pattern at 60 GHz is achieved by considering a 2D arbitrary shape lens antenna close in two metal half disks useful for high speed Wi-Fi 802.11ad devices. Another application of such class of antennas is illustrated in [3] where the authors presented a lens-coupled patch antenna array for imaging applications.…”

Section: Introductionmentioning

confidence: 99%

“…This architecture consists of a two-dimensional array featuring a monolithic microwave integrated circuit (MMIC) front-end. In [1] the authors presented a fully polarimetric integrated monopulse receiver working in W-band frequency range. The proposed structure is composed by 2 × 2 array of slot-ring antennas covered by a hemispherical dielectric lens.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Mathematical Modeling of 3D Supershaped Dielectric Lens Antennas

Mescia

Bia²,

Caratelli

et al. 2016

Mathematical Problems in Engineering

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The electromagnetic analysis of a special class of 3D dielectric lens antennas is described in detail. This new class of lens antennas has a geometrical shape defined by the three-dimensional extension of Gielis’ formula. The analytical description of the lens shape allows the development of a dedicated semianalytical hybrid modeling approach based on geometrical tube tracing and physical optic. In order to increase the accuracy of the model, the multiple reflections occurring within the lens are also taken into account.

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“…Dielectric lenses can be hemispherical [7], ellipsoidal [8], or flat-shaped [9]. Various planar feed antennas, such as slot-ring [10] and patch antennas [11], have been successfully utilized for dielectric lenses.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Elliptical Lens Antenna for Fan-Beam Monopulse Applications

Hua¹,

Wu²,

Yang³

et al. 2012

PIER Letters

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A novel two-dimensional elliptical lens monopulse antenna at millimeter-wave frequencies is presented using the technique of dielectric-filled parallel plates where TE 10 mode propagates. A cavity-backed aperture-coupled elliptical patch antenna array with sum/difference ports is located at the back of the elliptical lens as the feed antenna. The lens antenna is designed, fabricated and tested at 35 GHz. Measurements show that clean and symmetrical fan-beam patterns are realized for both the sum and the difference beams. The measured 3-dB E-and H-plane beamwidths of the sum pattern are 5.3 • and 37 • , respectively. A gain of 16.7 dBi is realized for the sum beam (86% radiation efficiency), while a deep null of −32.4 dB is achieved for the difference beam. In addition, a 10-dB impedance bandwidth of 7.1% is measured for both the sum and difference beams.

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A W-band dielectric-lens-based integrated monopulse radar receiver

Cited by 76 publications

References 12 publications

A Novel Millimeter-Wave Dual-Fed Phased Array for Beam Steering

A Novel Millimeter-Wave Dual-Fed Phased Array for Beam Steering

Electromagnetic Mathematical Modeling of 3D Supershaped Dielectric Lens Antennas

Millimeter-Wave Elliptical Lens Antenna for Fan-Beam Monopulse Applications

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