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- Title
Design of a Novel Sampling Pulse Generator for Ultra-Wideband Through-Wall Radar.
- Authors
GUO Yu; ZHU Guo-fu
- Abstract
In the receiver of through-wall radar, equivalent sampling technology is the key technology which requires a narrow and high-amplitude pulse to trigger the sampling gate for sampling. In this paper, the ultra-wideband (UWB) pulse technologies are described, and then different approaches for generating UWB pulse are analyzed and compared. The considered pulse generation technologies are based on logic gates, Step-Recovery Diodes (SRD) and avalanche transistors. Furthermore, a novel approach for the sub-nanosecond sampling pulse generator of the equivalent sampling receiver is investigated. The basis of the generator is an avalanche transistor and a unique pulse-shaping circuit, which is composed of the Schottky diode and used to reduce the pulse width and maintain the higher pulse amplitude. Finally, the sampling pulse generator with pulse duration of 400 ps, pulse amplitude of 6.46 V and ringing level of -14.7 dB is simulated and fabricated. Good agreement between the measured and simulation results is achieved. With the features such as simple structure, stable performance and low cost, the proposed design is ideal for the sampling pulse of the UWB equivalent sampling receiver.
- Subjects
ULTRA-wideband antennas; ULTRA-wideband radar; ANTENNAS (Electronics); SCHOTTKY barrier diodes; SEMICONDUCTOR-metal boundaries
- Publication
Telecommunication Engineering, 2014, Vol 54, Issue 9, p1280
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2014.09.020