Picosecond pulse generator using delay lines

Transmission Delay Line Based ID Generation Circuit for RFID Applications

“…At these frequencies, a microstrip transmission line, terminated with a resistance equal to , is equivalent to an infinite-length transmission line with only and components distributed along the length. The characteristic impedance, , and the time delay, associated with the microstrip transmission line are given by (2) and (3) where time delay in the transmission line is constant per unit length and is distributed uniformly along the length. The schematic diagram of the transmission delay line based ID generation circuit is shown in Fig.…”

“…[2]- [5]. A novel radio frequency identification (RFID)-based sensor design has been proposed in our earlier work [6] using delay lines for ID generation.…”

UWB Transmitter Design

“…Formation of an impulse using delay line is a classical technique used in the digital or pulse circuit areas. Some SRD impulse or monocycle-pulse generators have been designed using the same delay-line principle and implemented on microstrip or coplanar waveguide (CPW) structures [11][12][13][14]21]. Another type of SRD impulse generator, extensively used for sub-nanosecond pulse generation and microwave multiplier, is the shunt-mode SRD impulse generator [22][23][24][25].…”

Design and realization of a UWB radar for breath activity monitoring

“…The circuit is constituted by a step recovery diode (SRD DVB-6723) that, starting from the 5 ns transition time of the generator, gives rise to a step with a fall time lower than 200 ps. A short circuited transmission line converts the step into a pulse [9][10][11]. By carefully designing the stub length and the width of the transmission line, a pulse with a width of about 200 ps has been achieved.…”