first phased-array antennas
Implementation and tuning of optical singlesideband modulation in ring resonator based optical beam forming systems for phased array receive antennas
... Chapter 2 Optical beam forming system received RF signal consists of a desired signal in a frequency band 10.7–12.75 GHz. This range is subdivided into many frequency slots of 26MHz to 36MHz with guard bands of 4MHz. ...
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Knowledge-Aided (Potentially Cognitive) Sidelobe Nulling on Transmit for Mechanical Distortions of Phased Array Antennas
... looking array airborne radar system, which is a narrowband M = 17 element ULA with half- wavelength interelement spacing and assume that the same ULA is used for both transmission and reception, namely, d ET = d ...
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Understanding and optimizing microstrip patch antenna cross polarization radiation on element level for demanding phased array antennas in weather radar applications
... There are numerous feeding mechanisms available for microstrip patch antenna elements. Well-known feeding techniques are aperture-coupling, probe-feeding, proximity- coupling and insert-feeding. Aperture-coupled patch ...
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A Flexible Integrated Photonic True Time Delay Phaser for Phased Array Antennas
... Regarding stage c), the TTDU outputs corresponding to each TS are combined together, through a power combiner, and connected to a single photodetector (in Fig. 2 four combiners are depicted, corresponding to four ...
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Adaptive Beam Synthesis for Phased Array Antenna
... Antenna Array systems are becoming increasingly more ...the array antenna is almost a necessary prerequisite to check the soundness of the design and performance ...MATLAB. First a programming ...
5
Optical phase synchronization in coherent optical beamformers for phased array receive antennas
... The first option studied is using a Peripheral Component Interconnect (PCI) DVB receiver card for a computer as signal quality/level indicator. After the OBFN, the optical signal is converted in the IF DVB signal ...
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Simulation of a ring resonator based optical beamformer system for phased array receive antennas
... are first re- trieved by mixing the QPSK signal with respectively a cosine and a ...are first processed by a matched filter (MF) to maximize the SNR, after which the signal is sampled in the middle of each ...
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Null Steering In Phased Antenna Array System Using Amplitude Only GA and PSO Palak N. Patel 1, Rizwan Alad2 , Ashish Pandya 3, Prarthan Mehta4
... in phased array antenna is used for synthesizing the array pattern with enforcing nulls in the direction of interference while simultaneously preserving the main beam in the direction of the desired ...
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Development of wideband phased array antenna
... is first presented. This is further extended to a linear array of spiral ...linear array for both polarizations is measured and presented for a 4:1 Wideband dual-circular polarized phased ...
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Least Mean Square (LMS) for Smart Antenna
... an array of antennas is exploited to achieve maximum reception in a specified direction by estimating the signal arrival from a desired direction (in the presence of noise) while signals of the same ...
6
Enhancement of Phased Array Size and Radiation Properties Using Staggered Array Configurations
... regular array and Staggered Configura- tion 1 are calculated using HFSS at different steering ...θ). First, the radiation patterns are calculated for a 16x16 regular array of Double Rhombus ...
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Enhancing the Directivity of Phased Array Antennas Using Lens-Arrays
... Lens-array structures are often electrically very large and cannot be analyzed using full-wave simulations in one piece. Although they are finite and made of dissimilar AFA cells, the design procedure usually ...
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ARMA feeding techniques for isoflux coverage from a micro satellite
... beam antennas. There are two kinds of electronically agile beam antennas; the first one is the well-known AESA (Agile Electronically Scanned Array) technique and the second, a new one, called ...
7
Microwave integrated phased array receivers in silicon
... The rapid evolution of the wireless communication world has resulted in a tremendous amount of activities involving building high-performance RF circuits in various technologies. Among many contenders, CMOS technology is ...
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Polarization Matched Radiating Array for Electronically Steered Phased Array Antenna
... Present paper discusses a series fed 2 × 2 polarization matched antenna array. In this, the amplitude of the input ports can be varied to align the polarization of antenna with the target antenna polarization. ...
6
Phased arrays: A strategy to lower the energy threshold for neutrinos
... prototypical phased array system, which is described in more detail in ...the array was 96 m below the surface of the ice. RF signals from the antennas were carried along 100-m lengths of ...
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Phased array antenna processing on reconfigurable hardware
... First a decision is made in which domain this processing is done. Signal processing can be done in both the analog and the digital domain. Analog signal processing requires devices such as phase shifters or delay ...
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Performance Analysis of Phased Array, Mimo and Phased Mimo Radars
... spaced antennas which we call phased-MIMO ...the phased-array radar, that is scanning the targets almost instantaneously by using electronic switching for beam steering at the transmitting ...
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Simulation as a Support for Ultrasonic Testing
... of phased array ...a phased array probe with 32 ...of phased ar- ray probe with the same aperture like previous probe, but only with 8 ...
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Microwave integrated phased array transmitters in silicon
... of phased-arrays in 24GHz, and described in Chapter 4, the local phase-shifting scheme presented here does not suffer from additional coupling-induced phase errors and signal loss in the distribution ...multiple ...
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