Topic
Phased array
About: Phased array is a research topic. Over the lifetime, 19428 publications have been published within this topic receiving 229231 citations. The topic is also known as: Phased Array Radar, PAR.
Papers published on a yearly basis
Papers
More filters
••
01 Nov 2015TL;DR: The proposed phased array antenna has good gain, efficiency, and 3D beam steering characteristics in the entire operation band, which makes it suitable for millimeter-wave 5G communications.
Abstract: This manuscript proposes a new design of phased array antenna for future fifth generation (5G) cellular communications. The proposed phased array antenna is designed on a low-cost N9000 PTFE substrate with overall size of 60×130×0.8 mm3. It consists of eight 28-GHz Vivaldi antenna elements used to form a linear phased array in the edge region (top-side) on a mobile phone PCB. The simulated results show that the antenna has the reflection coefficient (S11) less than −10 dB in the frequency range of 27.4 to 28.6 GHz. The proposed phased array antenna has good gain, efficiency, and 3D beam steering characteristics in the entire operation band, which makes it suitable for millimeter-wave 5G communications. In addition, the performance of the antenna in the vicinity of user's hand has been investigated in this study.
64 citations
••
TL;DR: In this paper, a 1/spl times/2 NLC switch is used to build a 1-bit, 3.33ns-duration, free-space OTDU using mirrors and total internal reflection corner prisms.
Abstract: Novel two-dimensional (2-D) spatial light modulator (SLM)-based optical time delay units (OTDU's) using freespace/solid optics and fiber delays are introduced for phased array antenna and wideband signal processing applications. In particular, the mature nematic liquid crystal (NLC) SLM technology is considered for the proposed architectures. A 1/spl times/2 optical switch is demonstrated using a parallel-rub birefringent-mode NLC cell, a bulk optics cube polarizing beamsplitter, and a sheet polarizer. Switch measurements taken at 633 nm show a >3400:1 or >35 dB output port optical isolation. The 1/spl times/2 NLC switch is used to build a 1-bit, 3.33-ns-duration, free-space OTDU using mirrors and total internal reflection corner prisms. The unit demonstrated a >30 dB optical (or >60 dB electrical) signal-to-noise ratio for both delay and no-delay positions. A 1500 pixel NLC SLM is built, and a 128:1 or 21 dB on/off isolation is demonstrated limited by the digital drive electronics of thin-film transistor (TFT)-based pixel control. >
64 citations
••
TL;DR: An energy-efficient 5G phased array incorporating a novel vertically polarized (V-pol) endfire planar folded slot antenna for user devices (UE) is presented and existing millimeter-wave (mmWave) hybrid beamforming architectures that have precluded the uniqueness of 5G antennas and UEs are analyzed.
Abstract: An energy-efficient 5G phased array incorporating a novel vertically polarized (V-pol) endfire planar folded slot antenna (PFSA) for user devices (UE) is presented. First, we analytically amend existing millimeter-wave (mmWave) hybrid beamforming architectures that have precluded the uniqueness of 5G antennas and UEs. The total power consumption of the derived switchable 5G UE antenna system is estimated to be reduced by approximately 70% in comparison with a recently reported fully digital mmWave 5G UE antenna system under identical conditions. This is attributed to the ability to deactivate certain RF chains based on the directive nature of antenna elements. The PFSA featuring a height profile of less than 1/ $9~\lambda _{ {0}}$ is derived from a planar folded slot structure. The designed and fabricated $1\times 4$ PFSA array features an impedance bandwidth of approximately 4 GHz with a center frequency of 37–39 GHz and the gain of 7.7 dBi with antenna efficiency of 94.12% at 39 GHz. An mmWave 5G beamforming module is demonstrated using the presented energy-efficient 5G beamforming architecture and V-pol endfire PFSA array. The fabricated module achieves a measured EIRP of 18.2 dBm and a scanning range of ±50° in azimuth at 28 GHz.
64 citations
•
31 May 2001TL;DR: In this article, a dual-polarized radiator for a phased array antenna includes two planar microstrip notch elements that interlock and are perpendicular to each other having their phase centers coincident.
Abstract: A dual-polarized radiator for a phased array antenna includes two planar microstrip notch elements that interlock and are perpendicular to each other having their phase centers coincident to provide advantageous operational characteristics when the elements are used to form a wide bandwidth, wide scan angle phased array antenna.
64 citations
••
TL;DR: In this article, a nearly distortionless antenna beam pattern and 180° steering were demonstrated in a linear seven-element array with a Bragg cell and an offset and radar frequency of 3.2 GHz.
Abstract: Microwave signals for all array elements in a phared array microwave antenna are simultaneously generated by spatial sampling of a moving sinusoidal interference pattern formed between two frequency-offset injection-locked laser diodes. The offset and radar frequency of 3.2 GHz were generated by a Bragg cell. A nearly distortionless antenna beam pattern and 180° steering are demonstrated in a linear seven-element array.
64 citations