Design of Low-Noise X-band Frequency Source Based on DDS-PLL

2020 ◽  
Author(s):  
Peidong Yao ◽  
Leijun Xu ◽  
Zhenhua Sun
Keyword(s):  
Low Noise ◽  
Band Frequency ◽  
X Band ◽  
Frequency Source

Design of a Fast-Sweeping C-X band Frequency Source Based on DDS and Frequency Multiplying Chain

2021 ◽  
Author(s):  
Yuwei Zhang ◽  
Awei Zhang ◽  
Chenkai He ◽  
Chunya Hou ◽  
Jinping Xu
Keyword(s):  
Band Frequency ◽  
X Band ◽  
Fast Sweeping ◽  
Frequency Source

Design of the High-Speed X-Band Frequency Hopping Source

2014 ◽  
Vol 662 ◽  
pp. 231-234
Author(s):  
Shuang Zhao ◽  
Dian Ren Chen
Keyword(s):  
High Speed ◽  
Frequency Hopping ◽  
Frequency Stability ◽  
Band Frequency ◽  
X Band ◽  
Frequency Source ◽  
The Stability ◽  
Stability And Accuracy ◽  
Low Phase Noise ◽  
Communication Equipment

In modern communication system, the spacing of channel becomes ever more finely. For communication equipment, it has made ​​high demands on the stability and accuracy of the frequency. Based on DDS technology, combined with the multiplier circuit, we developed a high-speed X-band frequency hopping source. Experimental results show that this frequency source is with excellent frequency stability and low phase noise.

scholarly journals A photoreceiver with an integrated X-band low-noise amplifier

2021 ◽  
pp. 41-46
Author(s):  
Igor Yunusov ◽  
Alekcey Kondratenko ◽  
Vadim Arykov ◽  
Mikhail Stepanenko ◽  
Pavel Troyan
Keyword(s):  
Transmission Lines ◽  
Signal Transmission ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Frequency Range ◽  
Optical Carrier ◽  
Band Frequency ◽  
X Band ◽  
Significant Extension ◽  
Noise Amplifier

The paper presents development results for a photodetector module with an integrated lownoise amplifier. The photodetector is based on a commercial indium-phosphide photodiode and a custom-designed adapter board and allows to use an optical carrier with wavelengths of 1.31 and 1.55 μm and performs optoelectronic conversion for electrical signals into 0–50 GHz range. The developed gallium arsenide low-noise amplifier is used to compensate photodiode conversion loss in the X-band frequency range. The photodetector module is intended for use as a microwave photonic link receiver, which provides a significant extension of the signal transmission range in comparison with classical types of transmission lines

A low noise X-band frequency synthesizer for 5G applications

2016 ◽  
Author(s):  
Kang-Chun Peng ◽  
Chiu-Chin Lin ◽  
Zu-Han Lin ◽  
Chien-Chang Chen ◽  
Che-Chang Hsu
Keyword(s):  
Frequency Synthesizer ◽  
Low Noise ◽  
Band Frequency ◽  
X Band

Design of Low Noise L-Band Frequency Source

2014 ◽  
Vol 1078 ◽  
pp. 313-316
Author(s):  
Shuang Zhao ◽  
Yu Bo Yue
Keyword(s):  
Communication Systems ◽  
Frequency Synthesizer ◽  
Electronic System ◽  
Low Noise ◽  
Test Results ◽  
Band Frequency ◽  
Frequency Agile ◽  
Frequency Source ◽  
L Band ◽  
Low Phase Noise

Frequency synthesizer provides frequency source for modern communication systems and computer systems. It is an essential part to the modern electronic system devices. This paper describes a wideband, frequency agile, low phase noise, low spurious frequency synthesizer. By using frequency multiplying technology, an S-band frequency source as the DDS clock is designed. The actual frequency source was tested. The test results show that the frequency synthesizer achieves the desired objectives.

Design of the X-Band Frequency Source Based on the Multiplying Technology

2014 ◽  
Vol 707 ◽  
pp. 425-428
Author(s):  
Shuang Zhao ◽  
Yun Qing Liu
Keyword(s):  
Phase Noise ◽  
Frequency Doubling ◽  
Electronic System ◽  
Band Frequency ◽  
Adjacent Channel Interference ◽  
Frequency Doubling Technology ◽  
X Band ◽  
Noise Frequency ◽  
Phase Noise Performance ◽  
Frequency Source

The phase noise performance of frequency source has a direct impact on the target measurement such as the adjacent channel interference of the electronic system, the transmission quality of information, the resolution of radar. In this paper, we achieved an X-band high stability, low phase noise frequency source which based on the DDS combination with frequency doubling technology. The test result shows that when the output of the frequency source is at 8.544GHz, the phase nosie is-103.58dBc/Hz at 1kHz and-101.94dBc/Hz at 10kHz.

Design of X-Band Frequency Source Based on PLL Technology

2014 ◽  
Vol 1046 ◽  
pp. 285-288
Author(s):  
Shuang Zhao ◽  
Le Le Zhang
Keyword(s):  
Phase Noise ◽  
Frequency Synthesizer ◽  
Satellite Communications ◽  
Frequency Multiplier ◽  
Test Results ◽  
Circuit Realization ◽  
Band Frequency ◽  
X Band ◽  
Frequency Source ◽  
Low Phase Noise

The frequency synthesizer is an important part of modern communication system. It is widely used in digital communications, satellite communications, remote telemetry, radar, navigation and other fields. For frequency source with low phase noise and low spurious, this paper gives hardware architecture and implementation method circuit realization of the X-band frequency source which use phase locked and frequency multiplier theory. Its main targets are tested. The test results show that the performance of the frequency synthesizer is preferably with lower spurious level and phase noise.

scholarly journals A Tri-Band Cooled Receiver for Geodetic VLBI

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2662
Author(s):  
José A. López-Pérez ◽  
Félix Tercero-Martínez ◽  
José M. Serna-Puente ◽  
Beatriz Vaquero-Jiménez ◽  
María Patino-Esteban ◽  
...  
Keyword(s):  
Very Long Baseline Interferometry ◽  
Low Noise ◽  
Cryogenic Temperatures ◽  
Geospatial Information ◽  
Receiver Noise ◽  
Geodetic Vlbi ◽  
Long Baseline ◽  
Front End ◽  
X Band ◽  
Santa Maria

This paper shows a simultaneous tri-band (S: 2.2–2.7 GHz, X: 7.5–9 GHz and Ka: 28–33 GHz) low-noise cryogenic receiver for geodetic Very Long Baseline Interferometry (geo-VLBI) which has been developed at Yebes Observatory laboratories in Spain. A special feature is that the whole receiver front-end is fully coolable down to cryogenic temperatures to minimize receiver noise. It was installed in the first radio telescope of the Red Atlántica de Estaciones Geodinámicas y Espaciales (RAEGE) project, which is located in Yebes Observatory, in the frame of the VLBI Global Observing System (VGOS). After this, the receiver was borrowed by the Norwegian Mapping Autorithy (NMA) for the commissioning of two VGOS radiotelescopes in Svalbard (Norway). A second identical receiver was built for the Ishioka VGOS station of the Geospatial Information Authority (GSI) of Japan, and a third one for the second RAEGE VGOS station, located in Santa María (Açores Archipelago, Portugal). The average receiver noise temperatures are 21, 23, and 25 Kelvin and the measured antenna efficiencies are 70%, 75%, and 60% in S-band, X-band, and Ka-band, respectively.

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