Stacked dual dipole MMDS feed
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 8, 1994
Issued Date -
N/A
app pub date -
Mar 15, 1993
filing date -
Jul 19, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multichannel, multipoint distribution services (MMDS) dipole antenna for receiving multiple channels in the S-band frequency range of 2000 and 3000 MHz is formed from a printed circuit board which is directly connected to a coaxial cable. On the printed circuit board are etched two stacked dipoles. Each of the dipoles has a first one-half element etched on the first side of the printed circuit board and the second one-half element etched on the second side of the printed circuit board. The first and second dipoles are oriented to be in phase with each other and are separated from each other at a wavelength spacing between 0.25 lambda and 0.40 lambda. The antenna of the present invention further uses a phase combining circuit and an impedance matching circuit etched on the printed circuit board for combining in phase the polarized signals, for canceling the non-polarized signals at 0.degree. and 180.degree., from the two stacked dipoles and for matching the impedance from the two dipoles to the impedance of the coaxial cable.
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