Recent Patents Review on Low-profile Ultrawideband Antennas for Future Broadband Communications (Invited Paper)
Qi Wu, Shiran Wang and Donglin Su
Affiliation: The authors are with School of Electronics and Information Engineering, Beihang University, Beijing 100191, China.
Keywords: Low-profile, Ultrawideband antennas, radiation patterns, monopole antennas, MMIC, half-ellipsoids, VSWR, broadband communications, FCC, planar dipole antennas, planar slot antennas, auxiliary elements, structural compensation, flat reflector, single lobe radiation
This paper provides a review on patents linked with low-profile Ultrawideband (UWB) antennas in the last
decade for broadband communications. Six selected patents on this topic including tapered slot antennas with reduced
profile, planar dipole antennas with flat reflector and planar slot antennas with flat reflector are highlighted and discussed
in detail. The trend of using structural compensation instead of using absorbing loads at the end of feeding lines or at the
body of antennas is rather obvious for improved antenna efficiencies as well as reduced fabrication costs. At the same
time, difficulties of impedance matching encountered for structural compensation and reduced profile are partly overcome
by using new structural mechanisms, such as the coupled feeding schemes, inductance loaded structures and compact
baluns. These noticeable progresses on this topic could play an important role in the development of various broadband
communications and other broadband applications.
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