A Novel UWB Pulse Expander Using an Integrated Microstrip Splitter, Delay Lines, and a Combiner

A Novel UWB Pulse Expander Using an Integrated Microstrip Splitter, Delay Lines, and a Combiner

Blog Article

Passive pulse shaping at frequencies above 1 GHz is mainly achieved through frequency-domain processing using filters.Unfortunately, the conventional frequency domain approach does not allow precise control of the impulse response of the filter, therefore, setting limitations to the pulse shaping accuracy.Sub-nanosecond pulse expansion that preserves steep pulse transitions is one of the ultra-wideband (UWB) applications where frequency domain approaches do not provide satisfactory results.This paper proposes a highly innovative approach based on time-domain signal processing using a here set of parallel microstrip delay lines connected in a network accompanied by a splitter at the input and a combiner at the output.

The proposed design, analogous to finite impulse response (FIR) filters in digital signal processing (DSP), provides fine-grained control over time-domain characteristics read more and supports the implementation of complex functions, including pulse expansion.This paper presents a detailed analysis of previous work and theoretical considerations regarding the advantages and limitations of UWB pulse time-domain processing.Moreover, detailed HFSS simulations of components, such as a microstrip pulse splitter, delay lines, a combiner, and their combinations, are presented.Finally, the results of the experimental validation of the device, fabricated on an FR-4 substrate, are presented.

Technology for effective implementation of a pulse splitter, delay lines, and a pulse combiner, as well as their matching, can be considered as key findings of the given research.Limitations associated with matching and delay estimation for pulsed UWB signals are highlighted.