An N-bit digitally variable ultra-wideband pulse generator for GPR and UWB applications

✍ Scribed by Sertac Yilmaz; Ibrahim Tekin

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 201 KB
• Volume: 48
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21620

✦ Synopsis

Abstract

This paper presents a low‐cost ultra‐wideband (UWB) pulse generator that can vary the pulse duration digitally by using a step‐recovery diode (SRD), microstrip transmission lines, and PIN diodes. First, a sharp edge is generated by using SRD circuitry. Then a pulse is formed from the sharp edge through the use of transmission lines and the PIN diodes. Based on the number of transmission lines (N), the duration of the pulse can be varied in 2^N^ steps. The UWB pulse generator circuits are implemented on an FR‐4 substrate using microstrip‐line technology and UWB pulses with durations of 550 to 2400 psec are measured. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1334–1339, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21620