Fully Electronic $E$-Band Personnel Imager of 2 m$^2$ Aperture Based on a Multistatic Architecture

Ahmed, Sherif Sayed; Genghammer, Andreas; Schießl, Andreas; Schmidt, Lorenz-Peter

doi:10.1109/tmtt.2012.2228221

Cited by 120 publications

(38 citation statements)

References 8 publications

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“…Earlier designs with fully-digital arrays were mainly used in military radar applications [20] and satellite communications [21]. Later, with the development of advanced DSP chips, the application domains have been extended to personnel imaging [22], automotive radar [23] and so on. Very recently, the first 5G fully-digital array hardware was presented in [24].…”

Section: Multiple Beam Generation Strategies In 5gmentioning

confidence: 99%

Active Multiport Subarrays for 5G Communications

Aslan

Puskely

Rœderer

et al. 2019

2019 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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A novel hybrid beamforming architecture based on a phased array of active multiport subarrays is proposed for multi-user 5G applications. The subarrays have multiple simultaneous fixed beams which are smartly combined at the user locations with relatively large gains towards the intended co-frequency users and sufficiently low inter-user interference levels. The presented architecture has a wider angular coverage than the existing subarray-based hybrid beamforming schemes and reduces the signal processing complexity significantly as compared to the fully digital beamforming.Index Terms-Butler matrix, fifth generation (5G), hybrid beamforming, multi-beam antenna, multi-user communication, space division multiplexing.

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Section: Multiple Beam Generation Strategies In 5gmentioning

confidence: 99%

Active Multiport Subarrays for 5G Communications

Aslan

Puskely

Rœderer

et al. 2019

2019 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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“…This correction required additional reference measurements made on a per-frequency basis: a measurement of free-space and a measurement of a metal plate at a known distance from the array [29]. Equation (2) describes the calibration method, where M is the actual measured signal which corresponds to S 11 in the monostatic case and S 21 in the bistatic case, F S is the measured signal when the array is radiating into Free space, R is the measured signal when the array in radiating into a reflecting metal plate placed at a distance D away, β is the propagation constant, and finally T is the desired target signal which is then used for imaging.…”

Section: A Correction For Sar Imagingmentioning

confidence: 99%

Wideband Imaging Array Using Orthogonally Fed Dual Varactor-Loaded Elliptical Slots

Baumgartner

Ghasr

Zoughi

2015

IEEE Trans. Instrum. Meas.

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Recent advances in several technological fronts have made it possible to design and develop real-time microwave imaging systems (cameras) for use in a wide range of applications. Proper design of the individual antenna array element in these systems is of critical importance. Furthermore, wideband versions of these imaging systems, which are capable of one-sided operation and in conjunction with advanced synthetic aperture radar imaging algorithms, can produce high-resolution 3-D holographical images. In this paper, an orthogonally fed, small elliptical dual varactor-loaded slot antenna, operating in K-band (18-26.5 GHz), is designed for use in such imaging systems. The feed design uses a coplanar waveguide with a 90°bend without a direct dc connection to the antenna. This feed structure accommodates effective placement of required switches while enabling one-sided measurement. Finally, the slot is loaded with two varactor diodes resulting in 3.5 GHz of bandwidth suitable for high-resolution microwave 3-D holographical imaging. The design of this slot and a (1/4) array of such slots is presented. Two arrays are fabricated and used independently, as well as simultaneously, to form (mono-and bistatic, respectively) imaging results.Index Terms-Antenna array feeds, antenna arrays, microwave imaging, millimeter wave imaging, nondestructive testing (NDT), synthetic aperture imaging.

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“…Current imaging systems-working in the millimeter wave (mmW) range-have been proven to offer good results in the detection of metallic and non-metallic threats (e.g., explosives, ceramic knives, or selfmade bomb precursors). During the screening process for these systems, however, passengers (i.e., at airports) must adopt a specific position and posture, [1][2][3] or they must move in a specific way in front of the scanner. 4 Furthermore, it is desirable for future screening systems to simultaneously offer a higher throughput and detection performance.…”

mentioning

confidence: 99%

“…In our work, 5 we have investigated the concept of a WTS that is based on an already-existing fully electronic mmW scanner. 3 This device, which does not include any moving mechanical parts, is known as the Quick Personnel Security (QPS) scanner and is shown in Figure 1(a). The QPS system, which works across a frequency range of 70-80GHz, consists of 3008 transmit and 3008 receive antennas that are distributed over an 2m.…”

mentioning

confidence: 99%