Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Hyunchul Chung"'
Autor:
Kyu Sung Lee, Hyunchul Chung
Publikováno v:
korean management review. 50:383-404
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 69:1772-1779
This article presents a low-power, high-gain, high-linearity phased-array transmit (Tx) beamformer chip in a 45-nm RFSOI process. An architecture employing a power amplifier with neutralization, a 180° active phase shifter and 11/22/45/90° passive
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 68:4753-4764
This article presents a 5G 37–42-GHz $8\times 8$ phased array. The array is based on $2\times 2$ SiGe transmit/receive (TRX) beamformer chips in the SiGe technology with 6 bits of phase control and 8 bits of gain control. A detailed study is presen
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 68:1794-1808
This article presents a packaged SiGe BiCMOS reflectometer for 0.01–26-GHz two-port vector network analyzers (VNAs). The reflectometer chip is composed of a resistive bridge coupler and two wideband heterodyne receivers for coherent magnitude and p
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 68:1697-1705
This article presents a two-channel 70–110-GHz frequency quadrupler in the GF8HP 0.12- $\mu \text{m}$ SiGe BiCMOS process. The $\times 4$ frequency multiplication is based on cascaded frequency doublers with an interstage bandpass filter to reject
Autor:
Hyunchul Chung, Eric Wagner, Qian Ma, Berktug Ustundag, Kerim Kibaroglu, Mustafa Sayginer, Gabriel M. Rebeiz, Yusheng Yin
Publikováno v:
2021 IEEE MTT-S International Microwave Symposium (IMS).
A 25–29 GHz phased-array with embedded filter, driver, up/down-converter and mm-wave PLL is presented. This work is based on two separate chips, a 2×2 SiGe BiCMOS beamformer chip with 14–15 dBm of output power per channel and a wideband up/down-
Publikováno v:
2020 IEEE/MTT-S International Microwave Symposium (IMS).
This paper presents a 25–29 GHz 64-element small-cell (RF to IF) dual-polarized/dual-beam phased-array for 5G communication systems. The small-cell includes dual-polarized antennas, sixteen 2 × 2 beamformers, a dual-channel driver (TX/RX), a dual-
28 GHz Active Monopulse Networks with Amplitude and Phase Control and -30 dB Null-Bandwidth of 5 GHz
Publikováno v:
2020 IEEE/MTT-S International Microwave Symposium (IMS).
This paper presents an active bi-directional monopulse comparator at 28 GHz. The four inputs from the antenna quads are first divided and fed into two 2×2 TRX beamformer chips to perform sum (Δ) or delta (Δ) operation in either azimuth or elevatio
Publikováno v:
GLOBECOM
This paper presents a complete 5G phased-array base-station, which consists of 2x32 element phased-arrays, each with vertical and horizontal polarization (V&H) for 5G polarization MIMO operation. The array is based on high performance 24-30 GHz 2x2 b
Autor:
Ridha Ben Mansour, Khalid Bamardouf, Amr M. Mahmoud, Hyunchul Chung, Hirdesh Varshney, Ali Al-Aithan, Sultan Ahmed, Faisal A. Abu Derman, Yeonghyeok Kim, Osman A. Hamed, Younggeun Lee, Ahmed Al-Ghamdi
Publikováno v:
DESALINATION AND WATER TREATMENT. 73:137-144