Communications: radio wave antennas – Antennas – Microstrip
Patent
1990-03-06
1991-08-20
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Microstrip
343713, 343830, H01Q 138
Patent
active
050418386
ABSTRACT:
An planar antenna for use with a cellular telephone has a dielectric substrate with conductive coatings on its two major surfaces. A coaxial cable extends through a central aperture in the substrate with a shield of the cable connected to coating on one surface and a center conductor of the cable connected to coating on the other substrate surface. A number of shunts extend through the substrate electrically connecting the coatings on the two surfaces at points along a line that runs through the central aperture. Another shunt extends through the substrate electrically connecting the coatings on the two surfaces at a point which is not along the line of the other shunts. The position of the last shunt is non-uniformly spaced with respect to the other shunts and is selected to alter an electrical characteristic of the antenna to a desired value.
REFERENCES:
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patent: 2996713 (1961-08-01), Boyer
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Paper written by inventors listed on Pat. No. 4,051,480 entitled "Conformal Dielectric-Filled Edge-Slot Antennas With Inductive-Post Tuning", IEEE Transactions on Antennas and Propagation, Sep. 1979.
"Flush-Mounted Antenna for Mobile Application", Electronics, D. R. Rhodes, Mar. 1949.
Liimatainen William J.
Thill Kevin
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