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.

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 Nanoparticles-decorated coal tar pitch-based carbon foam with enhanced electromagnetic radiation absorption capability

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20256-20264 ◽  
Author(s):  
Rajeev Kumar ◽  
Ashish Gupta ◽  
Sanjay R. Dhakate
Keyword(s):  
Electromagnetic Radiation ◽  
Coal Tar ◽  
Carbon Foam ◽  
Frequency Region ◽  
Radiation Absorption ◽  
Coal Tar Pitch ◽  
Band Frequency ◽  
X Band

Carbon foam decorated with magnetic and dielectric nanoparticles exhibited significantly improved EM radiation absorption in the X-band frequency region.

scholarly journals Investigation on the Dielectric Properties of Pulverized Oil Palm Frond and Pineapple Leaf Fiber for X-Band Microwave Absorber Application

2014 ◽  
Vol 893 ◽  
pp. 488-491 ◽  
Author(s):  
Elfarizanis Baharudin ◽  
Alyani Ismail ◽  
Adam Reda Hasan Alhawari ◽  
Edi Syams Zainudin ◽  
Dayang L.A. Majid ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Oil Palm ◽  
Microwave Absorber ◽  
Band Frequency ◽  
Pineapple Leaf Fiber ◽  
X Band ◽  
Oil Palm Frond ◽  
Palm Frond ◽  
Leaf Fiber

This paper presents the results on dielectric properties of pulverized material based on agricultural waste namely oil palm frond and pineapple leaf fiber for microwave absorber application in the X-band frequency range. The investigation is started by identifying the pulverized materials permittivities and loss tangents using coaxial probe technique, followed by density measurement comprising the determination of bulk and solid densities. Then, by using dielectric mixture model, the solid particle dielectric properties were determined. It is observed that the air properties give quite an effect on the permittivity and loss tangent of the pulverized materials. It is also found that the lower the material density the higher material dielectric constant will be. Furthermore, the results show that, both oil palm frond and pineapple leaf fiber are potential to be X-band absorber with average dielectric constant of 4.40 and 3.38 respectively. The loss tangents for both materials were observed to be more than 0.1 which mark them as lossy materials.

scholarly journals Complex Permittivity and Permeability Measurements and Numerical Simulation of carbonyl iron rubber in X-Band frequency

2014 ◽  
Vol 30 (2) ◽  
pp. 419-425 ◽  
Author(s):  
Adriano Luiz de Paula ◽  
Marcelo Bender Perotoni ◽  
Adriana Medeiros Gama ◽  
Luiz Alberto de Andrade
Keyword(s):  
Numerical Simulation ◽  
Complex Permittivity ◽  
Carbonyl Iron ◽  
Band Frequency ◽  
X Band ◽  
Permittivity And Permeability
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