Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1995-12-11
1997-08-05
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Plural separate diverse type
343727, 343890, H01Q 2129
Patent
active
056547226
ABSTRACT:
The invention relates to a device at antenna systems for generating radio waves, including a supporting structure mounting at least one main radiator (3) for transmitting radio waves and where high frequency electric currents are generated in the supporting structure when the main radiator (3) is transmitting the radio waves. In order to improve the range of the main radiator (3) and at the same time reduce its backward radiation, the supporting structure includes a secondary radiator (14) for each main radiator (3). The secondary radiator (14) has at least one break portion (12) for interrupting or breaking the high frequency currents generated therein and through the thereby interrupted flow of the high frequency currents in the supporting structure reduce deviations from the desired range and/or direction of the radio waves transmitted by the main radiator (3). The secondary radiator (14) includes a connecting means (13) provided to connect portions of the supporting structure located on opposite sides of the break portion (12), whereby the connecting means (13) is provided to impart a flow path to the high frequency currents flowing through the supporting structure such that the energy represented by the currents permits the secondary radiator (14) to transmit radio waves with a suitable amplitude and phase relative to the amplitude and phase of the radio waves transmitted by the main radiator (3).
REFERENCES:
patent: 3710340 (1973-01-01), Mayes
patent: 4329690 (1982-05-01), Parker
Eriksson Stefan Georg
Lundback Hans Olof
Antel Sweden AB
Teracom Components AB
Wimer Michael C.
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