Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Reexamination Certificate
2002-06-19
2003-11-18
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
C343S795000
Reexamination Certificate
active
06650301
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to antennas. More particularly, it concerns a single piece twin folded dipole antenna for use in wireless telecommunications systems.
BACKGROUND OF THE INVENTION
Base station antennas used in wireless telecommunication systems have the capability to transmit and receive electromagnetic signals. Received signals are processed by a receiver at the base station and fed into a communications network. Transmitted signals are transmitted at different frequencies than the received signals.
Due to the increasing number of base station antennas, manufacturers are attempting to minimize the size of each antenna and reduce manufacturing costs. Moreover, the visual impact of base station antenna towers on communities has become a societal concern. Thus, it is desirable to reduce the size of these towers and thereby lessen the visual impact of the towers on the community. Using smaller base station antennas can reduce the size of the towers.
There is also a need for an antenna with wide impedance bandwidth which displays a stable far-field pattern across that bandwidth. There is also a need for increasing the bandwidth of existing single-polarization antennas so they can operate in the cellular, Global System for Mobile (GSM), Personal Communication System (PCS), Personal Communication Network (PCN), and Universal Mobile Telecommunications System (UMTS) frequency bands.
The present invention addresses the problems associated with prior antennas by providing a novel single piece twin folded dipole antenna including a conductor forming two integral radiating sections. This design exhibits wide impedance bandwidth, is inexpensive to manufacture, and can be incorporated into existing single-polarization antenna designs.
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Andrew Corp.
Ho Tan
Welsh & Katz Ltd.
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