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.
","abstract_html":"<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>","abstract_has_math":false,"creators":["Pepin, Kevin"],"institution":null,"degree_name":"Master of Science in Electrical & Computer Engineering","degree_level":"Thesis - Open Access","degree_discipline":"Electrical, Computer, Software, and Systems Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-04-01T07:00:00Z","date_published":"2025-04-01T07:00:00Z","updated_at":"2026-07-27T19:26:16Z","subjects":["Negative Impedance Converter ; Antenna ; Multi-Band","Electrical and Computer Engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://commons.erau.edu/edt/891","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Pepin, Kevin"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical, Computer, Software, and Systems Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis - Open Access"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Electrical & Computer Engineering"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Negative Impedance Converter ; Antenna ; Multi-Band","Electrical and Computer Engineering"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://commons.erau.edu/edt/891"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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.
"]},{"key":"dc:title","label":"Title","values":["Antenna Multi-Band Enhancement by Employing Negative Impedance Converters"]}]}],"canonical_facts":{"dc:creator":["Pepin, Kevin"],"dc:description.abstract":["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.
"],"dc:identifier":["https://commons.erau.edu/edt/891"],"dc:subject":["Negative Impedance Converter ; Antenna ; Multi-Band","Electrical and Computer Engineering"],"dc:title":["Antenna Multi-Band Enhancement by Employing Negative Impedance Converters"],"thesis:degree_discipline":["Electrical, Computer, Software, and Systems Engineering"],"thesis:degree_level":["Thesis - Open Access"],"thesis:degree_name":["Master of Science in Electrical & Computer Engineering"]},"updated_at":"2026-07-27T19:26:16Z"}