scholarly journals Shape and Weighting Optimization of a Subarray for an mm-Wave Phased Array Antenna

2021 ◽  
Vol 11 (15) ◽  
pp. 6803
Author(s):  
Taeyong Jeong ◽  
Juho Yun ◽  
Kyunghyun Oh ◽  
Jihyung Kim ◽  
Dae Woong Woo ◽  
...  
Keyword(s):  
Objective Function ◽  
Phased Array ◽  
Quadratic Function ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Array Pattern ◽  
Full Wave ◽  
Array Antennas ◽  
Low Sidelobe ◽  
Half Power

This paper discusses how to optimize the weighting of individual subarrays to derive the low sidelobe level (SLL) based on quadratic programming (QP) and how to derive QP parameters to ensure that the objective function is composed of the quadratic function form, with the actual number identical to the standard objective function of QP. Next, in order to analyze the SLL, a 24 × 24 phased array antenna was compared with 96 transmit–receive modules (TRMs) attached only to the subarray stage and a phased array antenna with 576 TRMs attached to all radiating elements without a subarray. Optimized weighting was applied to the array antennas with a subarray, and Taylor weighting was applied to the array antennas without a subarray. The number of TRMs used in the phased array antenna with the optimized weighting was reduced by 83.3% compared to the phased array antenna in which TRMs were attached to all radiating elements. The SLL and the half-power beamwidths (HPBWs) of the two antennas were practically identical in a narrow beam-scanning environment. Finally, an array pattern (AP) in which mutual coupling between the radiating elements was considered was calculated to verify the optimized weighting. Moreover, the optimized weighting was applied to CST Microwave Studio (an EM full-wave simulation) to compare the results from the AP calculation and a simulation. It was confirmed that the two results above are largely indistinguishable. The analysis found that the HPBW is 3.6∘× 3.6∘ and the SLL is −26.18 dB from AP calculations in the boresight direction. When each 5∘ beam was scanned at the azimuth and elevation, the corresponding HPBW values were 3.7∘× 3.7∘ and 3.7∘× 3.7∘ and the SLLs were −22.70 dB and −24.44 dB according to the AP calculations.

scholarly journals Wide-Angle Scanning Phased Array Antenna using High Gain Pattern Reconfigurable Antenna Elements

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
ByungKuon Ahn ◽  
In-June Hwang ◽  
Kwang-Seok Kim ◽  
Soo-Chang Chae ◽  
Jong-Won Yu ◽  
...  
Keyword(s):  
Phased Array ◽  
High Gain ◽  
Array Antenna ◽  
Reconfigurable Antenna ◽  
Wide Angle ◽  
Phased Array Antenna ◽  
Design Guideline ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Scanning Range

AbstractThis paper presents a wide-angle scanning phased array antenna using high gain pattern reconfigurable antenna (PRA) elements. Using PRA elements is an attractive solution for wide-angle scanning phased array antennas because the scanning range can be divided into several subspaces. To achieve the desired scanning performance, some characteristics of the PRA element such as the number of switching modes, tilt angle, and maximum half-power beamwidth (HPBW) are required. We analyzed the required characteristics of the PRA element according to the target scanning range and element spacing, and presented a PRA element design guideline for phased array antennas. In accordance with the guideline, the scanning range was set as ±70° and a high gain PRA element with three reconfigurable patterns was used to compose an 8x1 array antenna with 0.9 λ0 spacing. After analyzing whether the active element patterns meet the guideline, the array antenna was fabricated and measured to demonstrate the scanning performance. The fabricated array can scan its beam from -70° to 70° by dividing the scanning range into three subspaces. It shows that even if the array antenna has large element spacing, the desired scanning performance can be obtained using the elements designed under the guideline.

Technology Research about Beamforming of Multiple-Beam Array Antenna

2014 ◽  
Vol 568-570 ◽  
pp. 1336-1339
Author(s):  
Gao Feng Pan ◽  
Sheng Liang ◽  
Hao Xue ◽  
Guang Ming Xu ◽  
Xing Yuan Xu
Keyword(s):  
Theoretical Basis ◽  
Phased Array ◽  
Array Antenna ◽  
Engineering Practice ◽  
Technology Research ◽  
Phased Array Antenna ◽  
Key Technology ◽  
Beam Array ◽  
Low Sidelobe ◽  
Beamforming Algorithm

Active phased array antenna (APAA) can realize multi-object tracking and the beamforming is the key technology. Multi-area array and the implement method of its beamforming are introduced in this paper. Coordinated transformation formula is offered based on engineering practice and beams are synthesized by beamforming algorithm of low sidelobe. Following simulation shows results about beam coverage, those provide theoretical basis for the further research.

scholarly journals USE OF AN ACTIVE PHASED ARRAY ANTENNA IN RADAR’S SIDE LOBES CANCELLATION SYSTEM

2019 ◽  
pp. 19-23
Author(s):  
E. S. Parshina ◽  
K. Yu. Cheredeev
Keyword(s):  
Iterative Method ◽  
Phased Array ◽  
Side Lobe ◽  
Array Antenna ◽  
Antenna Synthesis ◽  
Phased Array Antenna ◽  
Array Pattern ◽  
Channel Interference ◽  
Radar Antenna ◽  
Impulse Interference

The paper describes an example of designing the radar’s side lobes cancellation system. It is based on the scheme of one channel interference canceler. The analysis of the antennas, which are ussually used in radar’s side lobes cancellation systems, is done, and active phased array antenna is chosen as an antenna of the radar’s side lobes cancellation system. The array pattern was formed by using antenna synthesis iterative method in order to fulfill the radar’s side lobes cancellation system’s antenna requirements. The antenna modeling results and its’ analysis are presented. The radar’s side lobes cancellation system with active phased array antenna eliminates intentional noise or impulse interference from any side lobe directions of the radar antenna.

scholarly journals Flower Pollination Algorithm for Adaptive Beamforming of Phased Array Antennas

2017 ◽  
Vol 2 (2) ◽  
pp. 1-5
Author(s):  
Tarek Abdel Rahman Sallam ◽  
Adel Bedair Abdel-Rahman ◽  
Masoud Alghoniemy ◽  
Zen Kawasaki
Keyword(s):  
Phased Array ◽  
Optimization Problems ◽  
Optimization Technique ◽  
Adaptive Beamforming ◽  
Array Antenna ◽  
Flower Pollination Algorithm ◽  
Phased Array Antenna ◽  
Phased Array Antennas ◽  
Flower Pollination ◽  
Array Antennas

This paper introduces the flower pollination algorithm (FPA) as an optimization technique suitable for adaptive beamforming of phased array antennas. The FPA is a new nature-inspired evolutionary computation algorithm that is based on pollinating behaviour of flowering plants. Unlike the other nature-inspired algorithms, the FPA has fewer tuning parameters to fit into different optimization problems. The FPA is used to compute the complex beamforming weights of the phased array antenna. In order to exhibit the robustness of the new technique, the FPA has been applied to a uniform linear array antenna with different array sizes. The results reveal that the FPA leads to the optimum Wiener weights in each array size with less number of iterations compared with two other evolutionary optimization algorithms namely, particle swarm optimization and cuckoo search.

scholarly journals EVALUATION OF THE FEASIBILITY OF AN ACTIVE PHASED ARRAY ANTENNA IN THE TERMINAL OF THE EXPRESS-RV SATELLITE COMMUNICATION SYSTEM

T-Comm ◽  
2021 ◽  
Vol 15 (8) ◽  
pp. 13-21
Author(s):  
Victor S. Aleshin ◽  
Keyword(s):  
Communication System ◽  
Satellite Communication ◽  
Phased Array ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Scanning Angle ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Mobile Satellite ◽  
Antenna Systems

The basic principles of building a promising domestic regional satellite communication system “Express-RV”, based on the highly elliptical orbit “Molniya” and intended for broadband access of civil sector subscribers to various public communication networks, in particular to the Internet, are considered. The main technical requirements for the antenna systems of mobile mobile satellite communication terminals of the Express-RV system are formulated. The necessity of using active phased array antennas for a number of types of such terminals is justified. A brief overview of the principles of implementation and examples of the design of microstrip active phased array antennas, including their elementary emitters and individual modules, are given. The problem of the occurrence of the blinding effect inherent in flat microstrip gratings made on dielectric substrates is noted; measures to compen-sate for this effect are considered. The possibility of expanding the maximum scanning angle of a narrowly directed beam of an active phased array antenna by using a magnetically controlled scattering dielectric lens, as well as creating segment-dome structures of antenna systems in relation to mobile terminals of mobile satellite communications of the “Express-RV” system, is shown. Simple analytical relations are derived that allow us to estimate the number of elementary emitters required for the implementation of a receiving-transmitting active phased array antenna with specified technical characteristics: gain and maximum scanning angle; the corresponding dependencies are given. The cost of creating an antenna system based on an active phased array is estimated.

Analysis of Phased Array Antenna’s Vibration Effects on the Performance of Shipborne MLS

2014 ◽  
Vol 687-691 ◽  
pp. 1080-1086
Author(s):  
Hong Sen Xie ◽  
Peng Zhou ◽  
Jun Gan Wei ◽  
Ding Wang
Keyword(s):  
Random Vibration ◽  
Phased Array ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Array Pattern ◽  
Calibration Algorithm ◽  
Navigation Error ◽  
Error Calibration ◽  
Flight Deck ◽  
Vibration Error

In order to provide precise guidance for the landing of carrier-based aircrafts, the phased array antenna and the principle of time reference scanning beam are used in the shipborne MLS. The phased array antenna is installed under the flight deck of the ship stern, so the vibration could change the relative position of antenna elements, which will cause the navigation error. In this paper, through the establishment of antenna array pattern and phased array antenna vibration error model, an error calibration algorithm is proposed after the simulation of phased array antenna’s random vibration effects on the guiding performance of shipborne MLS in three axes. Computer simulations show that the calibration algorithm could improve the guiding performance of shipborne MLS.

scholarly journals A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

2019 ◽  
Vol 9 (20) ◽  
pp. 4204 ◽  
Author(s):  
Hojoo Lee ◽  
Sungpeel Kim ◽  
Jaehoon Choi
Keyword(s):  
Phased Array ◽  
Cost Effective ◽  
Beam Width ◽  
Side Lobe ◽  
Array Antenna ◽  
Side Lobe Level ◽  
Phased Array Antenna ◽  
Half Power ◽  
Mobile Handset ◽  
Air Hole

In this paper, a 28 GHz fifth-generation (5G) phased array antenna with air-hole slots for beam width enhancement is proposed. The proposed antenna consists of eight dipole radiators on a mobile handset-sized ground with air-hole slots between the two adjacent elements for enhancing the half power beam width (HPBW) in the elevation plane. The dimensions of the proposed antenna are 130 mm × 42 mm × 0.127 mm. The proposed array antenna satisfies a −10 dB reflection coefficient in the frequency range from 27.2 to 29.2 GHz with a peak gain of 10.33 dBi and a side lobe level (SLL) of 13 dB. In addition to its good performance, the proposed antenna has a very wide HPBW (measured) in the elevation plane, up to 219 degree with a scan coverage of ±45 degree in the azimuth plane. The proposed antenna demonstrates excellent hemispheric beam coverage for 5G mobile handset devices and can enable cost-effective mass production.

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