Communications: radio wave antennas – Antennas – Slot type
Patent
1997-05-09
1999-10-12
Wong, Don
Communications: radio wave antennas
Antennas
Slot type
343702, 343770, H01Q 1310, H01Q 124
Patent
active
059661011
ABSTRACT:
A multi-layered compact slot antenna shortens the physical length of a slot antenna (710) by using more than one conductive layer, separated by a dielectric layer, to create inductor structures (790, 795) within a slot antenna. Adding inductance to a slot antenna allows a physical reduction in slot length without altering the antenna's radiant frequency range. The geometry of the inductor structures can be designed so that the electric current direction seen about the slot and the electric field direction across the slot is maintained, which aids antenna efficiency and allows arrangements of multiple compact slot antennas. Capacitor structures (780, 785) can also be included to balance out the additional stored magnetic energy in the inductor structures (790, 795).
REFERENCES:
patent: 4063246 (1977-12-01), Greiser
patent: 4367475 (1983-01-01), Schiavone
patent: 4706050 (1987-11-01), Andrews
patent: 4899164 (1990-02-01), McGrath
patent: 5068670 (1991-11-01), Maoz
patent: 5757326 (1998-05-01), Koyama et al.
"Microstrip Lines And Slotlines," by K.C. Gupta, Ramesh Garg, and I.J. Bahl, ARTECH, Chapter 1, Microstrip Lines 1, pp. 1-5, Chapter 5, Slotlines 1, pp. 195-223.
IEEE Transactions On Microwave Theory And Techniques, vol. MTT-17, No. 10, Oct. 1969, "Slot Line On A Dielectric Substrate," by Seymour B. Cohn, Fellow, IEEE, pp. 768-778.
Haub David Ryan
Smith Hugh Kennedy
Vannatta Louis Jay
Chen Sylvia
Motorola Inc.
Nguyen Hoang
Wong Don
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