Widebanding techniques for VHF antennas - I
MetadataShow full item record
A straight wire antenna of fixed length is narrow band due to the rapid variations in its input impedance, and to a lesser degree, in its radiation pattern. A wire antenna is, however, lightweight, easy to fabricate and simple to mount on any platform. To make a wire antenna broadband, we need resistive and/or reactive loading along its length. In this report, we consider monopole antennas loaded with (a) modified Wu-King resistivity profile, and (b) complex lumped loads. A 1-m monopole antenna is considered over 30-90 MHz. Input impedance and radiation efficiency data for the two cases are generated by employing the moment method. Tuning networks are designed using the real frequency method of Carlin to maximize the power transfer from a 50 ohm source to the antenna. Overall performance of the antenna by taking into account the mismatch loss due to the tuning network and resistive loss due to the loading is studied
NPS Report NumberNPS-EC-92-010
Showing items related by title, author, creator and subject.
Feuerstein, M.; Agrawal, B.N. (1994);The AA4871 Spacecraft Design course is the capstone class for the M.S. in Astronautics at the Naval Postgraduate School. Thc design team integrated a Topaz If nuclear power system with an EOS Synthetic Aperture Radar to ...
Integrated masts for ship radiofrequency electromagnetic interference mitigation – a preliminary electromagnetic characterization study (u) Dall’Armi-Stoks, Giuseppina (Monterey, California. Naval Postgraduate School, 2011-12); NPS-EC-12-002This report provides an electromagnetic characterization analysis in order to ascertain if integrated masts are an effective ship radiofrequency electromagnetic interference mitigation strategy. Free space and fitted antenna ...
Lebaric, J.; Ah-Tuan Tan (2000);This paper presents the development of an ultra-wideband (300 to 3000 MHz), vertically polarized, nearly omni-directional (in azimuth) communications antenna integrated into the camouflage cover of a standard military-issue ...