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The design of wide BW frequency synthesizer based on the DDS&PLL hybrid method
2009 Edition, August 1, 2009 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Frequency synthesizer is an important component in the modem electronic systems. This paper studied a kind of frequency synthesizer in the UAV system and put forward an improvement method for DDS (Direct Digital Synthesis) & PLL...

An avoidance technique for mitigating the integer boundary spur problem in a DDS-PLL hybrid frequency synthesizer
2015 Edition, April 1, 2015 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Modem frequency hopping radios makes use of Direct Digital Synthesis (DDS) - Phase Locked Loop (PLL) hybrid architecture based frequency synthesizers. The advantage is the fast switching speed and fine tuning resolution of...

High spectrum purity signal source applied in X-band radar frequency criterion generator
2001 Edition, January 1, 2001 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A high spectrum purity DDS-PLL signal source applied in X-band radar frequency criterion generator is introduced. It's specifications list the following: output frequency range 8500 MHz/spl sim/9800 MHz; hopping step 1 kHz; hopping points 1,000,000; phase noise...

Design & implementation of fast frequency hopping Tx IF module for satellite terminal based on DVB-RCS
2003 Edition, Volume 4, January 1, 2003 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper the method for the minimization of satellite Tx IF module is presented. The proposed Tx IF module can support fast frequency hopping up to /spl plusmn/10 MHz around the center frequency within guard time, 6 usec. For minimizing...

Development of frequency synthesizer based on DDS+PLL
2011 Edition, Volume 2, October 1, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Phase Locked Loop (PLL) and Direct Digital Frequency synthesis are used widely in the modern frequency synthesis technology. They have their merits and disadvantages respectively. It is feasible to combine the two methods to perform their merits and...

Digital Frequency Synthesizer Based on Two Coprime Moduli DDS
2006 Edition, Volume 53, December 1, 2006 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A new concept for direct digital synthesizer (DDS) design is presented in this brief. The originality of the method consists on the use of a traditional modulus 2L DDS and a novel modulus (2 L-1) DDS whose outputs...

Design and analysis methods of a DDS-based synthesizer for military spaceborne applications
1994 Edition, January 1, 1994 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Modern wideband, multi-user antijam communication systems typically employ frequency hopping techniques to maximize system processing gains. Such frequency plans place strict constraints on the hopping LO in the form of spurious, phase noise, and transient...

A Wide Band Fractional-N Synthesizer in 0.18μm CMOS Process
2019 Edition, June 1, 2019 - Lodz University of Technology

In this paper, a wideband synthesizer with output range of 2.1GHz-2.5GHz and resolution of 1MHz and input reference of 50Mhz is proposed. In this method, firstly, by the Integer-N synthesizer based on PLL and constructed...

A high-speed continuous wave GPR
2004 Edition, Volume 1, January 1, 2004 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this work an innovative high speed continuous wave stepped frequency GPR has been designed and implemented with the aim of overcoming the low speed issue of wide bandwidth CW-SF GPRs. It is based on a structure combining a Digital...

Design and Implementation of an Active Array Antenna With Remote Controllable Radiation Patterns for Mobile Communications
2014 Edition, Volume 62, February 1, 2014 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents an active array antenna for wideband code division multiple access (WCDMA) base station application with remote controllable radiation patterns. The proposed array consists of eight antenna elements and each element is integrated with a phase controllable...

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