Antenna Multi-Band Enhancement by Employing Negative Impedance Converters

<p>This thesis presents the implementation of a Negative Impedance Converter (NIC) integrated with a planar monopole antenna, originally centered at 2.9 GHz, to create a multi-band network. The network exhibits resonances at frequencies of 0.9 GHz, 1.5 GHz and 1.9 GHz. The work highlights the design process of pairing a NIC with a capacitive, single-band antenna, addressing key challenges such as overcoming the limitations associated with low self-resonant frequency (SRF) inductors. The design process included the use of measurement-based component models and radio-frequency simulations using Keysight Advanced Design Systems (ADS). The developed NIC emulates a -0.99 pF capacitor using two BFR93A transistors. The boards were fabricated on Rogers RT/duroid 5880, laser machined using a picosecond laser and subsequently tested for its scattering parameters. Performance measurements at both, without DC bias and 10 V, revealed a notable difference in matching between the active and passive states, confirming that the NIC effectively supersedes the passive matching of its components.</p>

Name thesis:degree_name

Master of Science in Electrical & Computer Engineering

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Electrical, Computer, Software, and Systems Engineering

Year

2025

Author dc:creator

• Pepin, Kevin

• Negative Impedance Converter ; Antenna ; Multi-Band
• Electrical and Computer Engineering

Repository record dc:identifier

https://commons.erau.edu/edt/891

OAI identifier oai:identifier

oai:commons.erau.edu:edt-1931