Results 1 to 10 of about 1,129,195 (294)
The Design of a Sliding Rectangular Waveguide Array Antenna for Beam Steering [PDF]
Journal of Electromagnetic Engineering and Science, 2023 In this paper, we designed a sliding waveguide array antenna that can be beam-steered via mechanical manipulation. This reduces the vulnerability of electronic beam-steering radars mounted on ships or aircraft to electromagnetic pulse (EMP) attacks.
Yoon-Seon Choi +3 more
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Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R [PDF]
Journal of Electromagnetic Engineering and Science, 2023 In this study, a dual-mode waveguide circularly polarized antenna for TC&R (telemetry, command, and ranging) was proposed for the communication between a low-orbit satellite and a ground station. The proposed antenna required both a wide −10 dB bandwidth
Dong-Su Choi +4 more
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Characteristics of 6 × 26 Slotted Waveguide Array Antenna for Wave Monitoring Radar System [PDF]
Journal of Electromagnetic Engineering and Science, 2021 This paper presents the characteristics of a 6 × 26 slotted waveguide array antenna for a wave monitoring radar system. The proposed antenna was designed as a double-layer structure that operated in the Ku-band and combined the radiating antenna and ...
You-Seok Yeoh, Kyeong-Sik Min
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IEEE Access, 2023 This study presents a complementary metal–oxide–semiconductor (CMOS) variable-gain low-noise amplifier (VGLNA) employing a transformer-based noise cancelling technique, applicable for fifth-generation new radio frequency range 2 ...
Segyeong Kim +3 more
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IEEE Access, 2023 The performance of underwater acoustic communication is significantly affected by multipath propagation and Doppler spread. In this paper, we propose a new communication technique called overlapped chirp spread carrier (OCSC) by modifying the existing ...
Chang-Hyun Youn +3 more
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IEEE Access, 2023 This study presents a broadband complementary metal-oxide semiconductor (CMOS) low noise amplifier (LNA), containing out-of-band (OB) blocker rejection capability without an additional calibration process.
Juhui Jeong +3 more
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INCREASING RADIATION RESISTANCE OF MEMORY DEVICES BASED ON AMORPHOUS SEMICONDUCTORS
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2020 A memory cell structure is proposed that uses a Schottky barrier thin film transistor based on an amorphous semiconductor as a junction element, and a chalcogenide glassy semiconductor film as a switching element.
Vasyl Kychak +2 more
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Sensors, 2021 In this paper, we propose underwater acoustic (UWA) communications using a generalized sinusoidal frequency modulation (GSFM) waveform, which has a distinct ambiguity function (AF) and correlation function characteristic.
Jeongha An +3 more
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Four-Array Printed Monopole Yagi-Uda Antenna Mounted on a Small Missile Warhead [PDF]
Journal of Electromagnetic Engineering and Science, 2021 In this study, the structure of a circular four-array antenna was designed for a monopulse radar attached to a conical small missile warhead with a diameter of 29 mm and a lateral length of 63 mm.
Dong-Su Choi +4 more
doaj +1 more source
Long-Range Acoustic Communication Using Differential Chirp Spread Spectrum
Applied Sciences, 2020 Here, we propose a new modulation method using chirp spread spectrum (CSS) modulation to indicate the result of long-range acoustic communication (LRAC).
Joohyoung Lee +3 more
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