Formation of the directivity with a circular overview of the flexible extended towed antenna in reception mode

2019 ◽  
Author(s):  
I. S. Bobrikov ◽  
A. V. Vagin
Keyword(s):  
Reception Mode

scholarly journals New Polarization Basis for Polarimetric Phased Array Weather Radar: Theory and Polarimetric Variables Measurement

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Jian Dong ◽  
Qingfu Liu ◽  
Xuesong Wang
Keyword(s):  
Phased Array ◽  
Time Series Data ◽  
Weather Radar ◽  
Element Model ◽  
Polarization Measurement ◽  
Series Data ◽  
Precipitation Estimation ◽  
Dual Polarized ◽  
Measurement Biases ◽  
Reception Mode

A novel scheme is developed for mitigating measurement biases in agile-beam polarimetric phased array weather radar. Based on the orthogonal Huygens source dual-polarized element model, a polarization measurement basis for planar polarimetric phased array radar (PPAR) is proposed. The proposed polarization basis is orthogonal to itself after a 90° rotation along the array’s broadside and can well measure the characteristics of dual-polarized element. With polarimetric measurements being undertaken in this polarization basis, the measurement biases caused by the unsymmetrical projections of dual-polarized element’s fields onto the local horizontal and vertical directions of radiated beam can be mitigated. Polarimetric variables for precipitation estimation and classification are derived from the scattering covariance matrix in horizontal and vertical polarization basis. In addition, the estimates of these parameters based on the time series data acquired with the new polarization basis are also investigated. Finally, autocorrelation methods for both the alternate transmission and simultaneous reception mode and the simultaneous transmission and simultaneous reception mode are developed.

scholarly journals Formation of additional virtual reception channels when processing signals at the outputs of elements of the antenna array of a promising cellular base station

2021 ◽  
Vol 24 (2) ◽  
pp. 79-87
Author(s):  
Alexander A. Bolkunov ◽  
Leonid A. Ovcharenko ◽  
Yuri G. Pasternak ◽  
Vladimir A. Pendyurin ◽  
Igor V. Popov ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Antenna System ◽  
Base Station ◽  
Radio Sources ◽  
Linear Antenna ◽  
Frequency Range ◽  
The Earth ◽  
Receiving Antenna ◽  
Reception Mode

The results of research on the layout of the antenna array for a promising cellular base station in the frequency range 1,81,88 GHz, which includes a linear antenna array of 12 slotted elements with rectangular directors, the diagram forming scheme of which uses a modification of the Rotman lens, characterized in that for the sake of reducing its overall dimensions, the lens is folded in half the earth is located in the center, and on both sides of it-the halves of the lens body with exponential strip transformers. It is shown that to reduce the level of the side lobes of the antenna system in the reception mode, interpolation and extrapolation antenna arrays can be used. An extrapolation array can also be formed in order to increase the directional coefficient of the receiving antenna system and resolve radio sources that are not resolved by the real antenna array.

Hearing aid system and operating method therefor in the audio reception mode

2009 ◽  
Vol 126 (3) ◽  
pp. 1645
Author(s):  
Torsten Niederdränk ◽  
Gottfried Rückerl
Keyword(s):  
Hearing Aid ◽  
Reception Mode ◽  
Operating Method

Polymer-Based Capacity Micromachined Ultrasonic Transducer for Surface Roughness Measurement

2015 ◽  
Vol 661 ◽  
pp. 22-28 ◽  
Author(s):  
Gia Thinh Bui ◽  
Yi Ze Chen ◽  
Da-Chen Pang
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Transducer ◽  
Roughness Measurement ◽  
Surface Roughness Measurement ◽  
Measure Surface Roughness ◽  
Capacitive Micromachined Ultrasonic Transducer ◽  
Signal Output ◽  
Good Signal ◽  
Reception Mode ◽  
Maximum Signal

A polymer-based capacitive micromachined ultrasonic transducer (CMUT) is developed to measure surface roughness. The transducer is designed with two groups in a ratio of two to one. By using air-coupled ultrasound, the transducer can evaluate surface roughness in five modes: full transmission/ full reception, majority transmission/ majority reception, majority transmission/ minority reception, minority transmission/ majority reception, and minority transmission/ minority reception. Experimentation shows the CMUT can identify the surface roughness using a sample of sandpaper with surface roughness Rrms ranging from 11.4μm to 179.8μm. The results indicate that the full transmission/ full reception mode has maximum signal output and the minority transmission/ majority reception mode can obtain a good signal output with a better energy efficiency rating.

Quasioptimal Estimation of GNSS Signal Parameters in Coherent Reception Mode Using Sigma-Point Kalman Filter Algorithm

2016 ◽  
Vol 24 (3) ◽  
pp. 26-37
Author(s):  
V.V. Shavrin ◽  
◽  
V.I. Tislenko ◽  
A.S. Konakov ◽  
V. A. Filimonov ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Sigma Point ◽  
Signal Parameters ◽  
Kalman Filter Algorithm ◽  
Reception Mode

scholarly journals Analysis of the Single Frequency Network Gain in Digital Audio Broadcasting Networks

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 569
Author(s):  
Kamil Staniec
Keyword(s):  
Signal Strength ◽  
Single Frequency ◽  
Digital Audio ◽  
Television System ◽  
Protection Level ◽  
Effective Coverage ◽  
Single Frequency Network ◽  
Digital Audio Broadcasting ◽  
Factors Influencing ◽  
Reception Mode

The single frequency network (SFN) is a popular solution in modern digital audio and television system networks for extending effective coverage, compared to its traditional single-transmitter counterpart. As benefits of this configuration appear to be obvious, this paper focuses on the exact analysis of so-called SFN gain—a quantitative effect of advantage in terms of the received signal strength. The investigations cover a statistical analysis of SFN gain values, obtained by means of computer simulations, with respect to the factors influencing the coverage, i.e., the protection level, the reception mode (fixed, portable, mobile), and the receiver location (outdoor, indoor). The analyses conclude with an observation that the most noteworthy contribution of the SFN gain is observed on the far edges of the networks, and the least one close to the transmitters. It is also observed that the highest values of the SFN gain can be expected in the fixed mode, while the protection level has the lowest impact.

scholarly journals Flexible ku/k band frequency reconfigurable bandpass filter

2022 ◽  
Vol 6 (1) ◽  
pp. 16-28
Author(s):  
Ambati. Navya ◽  
◽  
Govardhani. Immadi ◽  
Madhavareddy. Venkata Narayana
Keyword(s):  
Bandpass Filter ◽  
Low Cost ◽  
Pin Diode ◽  
Band Frequency ◽  
International Telecommunication ◽  
Wide Range ◽  
Direct Broadcast ◽  
Satellite Service ◽  
Reconfigurable Filters ◽  
Reception Mode

<abstract> <p>The proposed reconfigurable BPF satisfies the International Telecommunication Unionos (ITU) region 3 spectrum requirement. In transmit mode, the frequency range 11.41-12.92 GHz is used by the direct broadcast service (DBS) and the fixed satellite service (FSS). Direct broadcast service (DBS) in reception mode employs 11.7-12.2 GHz and 17.3-17.8 GHz frequency ranges. Frequency reconfigurable filters are popular because they can cover wide range of frequencies, reducing system cost and space. Another emerging trend is electronic component flexibility or conformability, which allows them to be mounted on non-planar objects and are used in wearable applications. This project contains a frequency-reconfigurable BPF that has been entirely printed on a flexible polimide substrate. Frequency reconfigurability is obtained by using a pin diode HSCH 5318 and it is used to switch between 12 GHz and 18 GHz. The prototype reconfigurable BPF is highly compact and low-cost due to the flexible polimide substrate and the measured results are promising and match the simulated results well.</p> </abstract>

Quasioptimal estimation of GNSS signal parameters in coherent reception mode using sigma-point Kalman filter

2017 ◽  
Vol 8 (1) ◽  
pp. 24-30 ◽  
Author(s):  
V. V. Shavrin ◽  
V. I. Tislenko ◽  
V. Yu. Lebedev ◽  
A. S. Konakov ◽  
V. A. Filimonov ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Sigma Point ◽  
Signal Parameters ◽  
Reception Mode
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