Developments in compact high-performance synthetic aperture radar systems for use on small Unmanned Aircraft

Zaugg, Evan C.; Edwards, M. C.; Long, D.G.; Stringham, Craig

doi:10.1109/aero.2011.5747414

Cited by 12 publications

(9 citation statements)

References 11 publications

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“…The motion creating the antenna displacement need not be continuous as evident in the derivation of the commonly used "stop and hop" approximation in radar signal modeling [1]. Radar platform motion during LFM-CW operation has some effect but can be compensated for [3,4]. The data must be collected with antenna displacements spaced no farther apart than one-half of the real-aperture antenna size in order to avoid grating lobes and aliasing.…”

Section: Methodsmentioning

confidence: 99%

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Ground-Based 3D Radar Imaging of Trees Using a 2D Synthetic Aperture

Penner

Long

2017

Electronics

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Motivated by the desire to gain insight into the details of conventional airborne synthetic aperture radar (SAR) imaging of trees, a ground-based SAR system designed for short-range three-dimensional (3D) radar imaging is developed using a two-dimensional (2D) synthetic aperture. The heart of the system is a compact linear frequency modulation-continuous wave (LFM-CW) radar, a custom two-dimensional scan mechanism, and a three-dimensional time-domain backprojection algorithm that generates three-dimensional backscatter images at an over-sampled resolution of 10 cm by 10 cm by 10 cm. The backprojection algorithm is formulated directly in spatial coordinates. A new method for estimating and compensating for signal attenuation within the canopy is used that exploits the backprojection image formation approach. Several three-dimensional C-band backscatter images of different individual trees of multiple species are generated from data collected for trees both in isolation and near buildings. The trees imaged in this study are about 10 m in height. The transformation of the three-dimensional images to airborne SAR images is described and a sample result provided.

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Section: Methodsmentioning

confidence: 99%

“…The microASAR is a compact, flexible, self-contained SAR system designed for operation in a small aircraft. It is described in detail in [2,3]. A block diagram of the RF subsystem is shown Electronics 2017, 6, 11 7 of 13 in Figure 6.…”

Section: D Imaging Sensormentioning

confidence: 99%

Ground-Based 3D Radar Imaging of Trees Using a 2D Synthetic Aperture

Penner

Long

2017

Electronics

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“…This limitation is based on the maximum size and weight of the payload allowable on the UAV. Several UAV‐mounted SAR systems have been recently reported . Thanks to the very short wavelength of ∼3 mm, the radar transceiver can be made more compact compared to that operating at lower frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…Several UAV-mounted SAR systems have been recently reported. [1][2][3][4] Thanks to the very short wavelength of $3 mm, the radar transceiver can be made more compact compared to that operating at lower frequencies. It is also very important to use antennas that are as small and as light-weight as possible, while maintaining the required antenna performance.…”

Section: Introductionmentioning

confidence: 99%

F lared SIW antenna design and transceiving experiments for W ‐band SAR

Dewantari

Kim

Jeon

et al. 2018

Int J RF Microw Comput Aided Eng

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In this article, the design of a small and light‐weight antenna and transceiving experiments for W‐band UAV‐mounted synthetic aperture radar (SAR) is presented. The antenna requirements i.e. gain, beam width, and antenna dimension are determined from the parameters of the radar system under implementation in our lab. To meet the requirements, 24‐by‐4 SIW slot array antennas have been designed. The antenna design includes a waveguide‐to‐microstrip transition for connection to circuits and metal flares for gain enhancement. Transceiving experiments are carried out by integrating the designed antennas with a SAR system prototype. Corner reflectors having various radar cross sections (RCS) are used as radar targets. Additionally, experiments with standard horn antennas are also carried out for a comparison. From the results, the designed SIW slot array antennas gives acceptable performance while maintaining small and light‐weight characteristics which are crucial for compact SAR.

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“…One way to improve the isolation is to use separate antennas (e.g. horn antenna with good directivity) for the transmitter and receiver [90,91]. In addition, leakage cancellation methods have been developed to mitigate leakage effects [92,93].…”

Section: Fmcw Radarmentioning

confidence: 99%

Design of low power fractional-N phase locked loop for FMCW radar application

Liu¹

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Developments in compact high-performance synthetic aperture radar systems for use on small Unmanned Aircraft

Cited by 12 publications

References 11 publications

Ground-Based 3D Radar Imaging of Trees Using a 2D Synthetic Aperture

Ground-Based 3D Radar Imaging of Trees Using a 2D Synthetic Aperture

F lared SIW antenna design and transceiving experiments for W ‐band SAR

Design of low power fractional-N phase locked loop for FMCW radar application

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