We have demonstrated a proof-of-concept optical device that can produce true time delays for a phased-array radar. This device combines White cells of differing lengths with a spatial light modulator to select between the paths on multiple bounces of a given beam. The approach can handle thousands of light beams and produce hundreds of different delays. The number of delays is proportional to t...

Modern phased array radars are able to adaptively modify their performance to the environment. To make full use of this capability, scheduling algorithms need to be designed. This paper poses the problem of adaptive waveform scheduling for detecting new targets in the context of finite horizon stochastic dynamic programming. The result is a scheduling algorithm that minimises the time taken to ...

Radar systems have come a long way since their introduction in the 1940’s, today encompassing a broad range of applications, ranging from supermarket door openers to highly complex shipboard phased-array fire-control radars. Modern systems require higher performance to work in today’s ever more complex Electronic Warfare (EW) environments, which include jamming and deception. As a result, EW sy...

In this paper, we propose a multi-beam and multi-range (MBMR) radar with frequency modulated continuous wave (FMCW) waveform and digital beam forming (DBF) algorithm to cover a detection area of long range and narrow angle (150 m, ±10◦) as well as short range and wide angle (60 m, ±30◦) as a single 24 GHz sensor. The developed radar is highly integrated with multiple phased-array antennas, a tw...

An adaptive-update-rate target-tracking algorithm is indeed a developed version of constant-update-rate tracking algorithms. The update rate is closely related with the level of target maneuvering and the required quality of tracking performance— the shorter the time intervals between two successive updates, the better the radar resources are made use of. Considering the needs of the phased-arr...

In a phased array radar, the phase quantisation error of shifters can lead to beam steering (BSE) between predetermined and actual directions. Existing researches on feeding optimisation suffer from high computational complexity large storage space. this study, an equivalent monopulse method is first proposed yield BSE with O(N) by formulating equation BSE. Further, symmetric compensation (SPFC...

In this paper we propose one possible approach how to apply the concept of multiple-input multipleoutput (MIMO) to monostatic Frequency Modulated Continuous Wave (FMCW) High-Frequency Surface Wave Radar (HFSWR) in a maritime environment. Common tasks for a HFSWR are sea-state monitoring and ship detection, where our focus is on ship detection. A limiting factor in HFSWR is the available bandwid...

We report the results of a demonstration of a real time delay, optically controlled phased array radar receiver. This implementation employed a free space configuration based upon an optical switching network using liquid crystal spatial light modulators (SLM’s). A three-delay unit, two-antenna array receiver was implemented at an optical wavelength of 1.3 pm and demonstrated “squint-free” oper...

Different from the phased-array using the same carrier frequency for each transmit element, the frequency diverse array (FDA) uses a small frequency offset across the array elements to produce range-angle-dependent transmit beampattern. FDA radar provides new application capabilities and potentials due to its range-dependent transmit array beampattern, but the FDA using linearly increasing freq...

—The paper introduces a frequency independent phase shifting technique suitable for RADAR, satellite and wireless telecommunications applications. The proposed phased array transmitter achieves a high degree of precision along with an arbitrary small phase step value. The theory governing the design of the phase shifter is thoroughly discussed and three prototypes operating in different bands r...