phased arraytrue time delay opticaThe aim of this paper is to present an integrated photonic TTD phaser (TPH) for PA, based on the technology introduced in J.E. Fouquet, (2000). In particular, the design of a digital 3 Bit TPH, feeding a 4 elements optical time steered antenna (OTSA)...
In this paper, we present a loss compensated photonic true-time delay module, employing erbium-amplified polymer waveguide (EAPW). The reconfigurable TTD line incorporates optical switches and fixed length waveguides, to provide numerous time delays with minimum hardware. The passive optical properties...
We demonstrate a true time-delay fiber-optically controlled phased-array transmitter with eight broadband spiral elements in a sparsely-populated array. The transmitter bandwidth is microwave-component limited to 2-18 GHz frequency range. The transmitter shows ±50° azimuth steering with no observed ...
Optical true-time delay techniques are promising for thesquint-free beam steering of phased-array antennas with the features of widebandwidth, compact size, reduced weight, and no electromagnetic interference.In this dissertation, a digital and an analog true-time delay module weredesigned, fabricated...
Practical/ antenna phased arrays antenna radiation patterns beam steering delays holographic optical elements laser tuning optical waveguides waveguide antenna arrays/ optical true-time-delay modules single tunable laser wavelength-controlled continuous beam-steering antenna system four-element X-band phased arr...
A fiber delay integrated switch (FIDELIS) photonic beamformer using a large optical switch allows compact implementation of true time delay for phased array radars. The use of a three-level subarray architecture enables very large beamformer arrays using only a small number of photonic time delays...
Measurement results of the prototype together with an antenna array for transient systems are presented in the time and frequency domain. 展开 关键词: Antenna arrays beam steering phased arrays Rotman-lens true time delay ultrawideband (UWB) ...
It is also shown to resolve closely spaced and disparately spaced sources in a single algorithmic pass. The method is compared to previous method in terms of bias and RMSE. 展开 关键词: MUSIC Array signal processing Direction-of-arrival (DOA) estimation beamspace processing Phased arrays True ...
Figure 3. A true time delay on common leg and phase shifters behind the V and H feeds of antenna elements to optimize beam squint while having wideband cross polarization capability. TTD coverage is set by the maximum delay ΔtMAX between most distant elements of the whole array at the low...
A fully integrated 4-channel UWB beam-former in 0.13μm CMOS uses a path-sharing true-time-delay architecture with 15ps resolution. The 3.1×3.2mm2 chip produces 11 different scanning angles within plusmn60deg with 10° spatial resolution for 25mm antenna spacing. The front-end achieves an ...