JPS55137703A - Antenna unit - Google Patents
Antenna unitInfo
- Publication number
- JPS55137703A JPS55137703A JP4570579A JP4570579A JPS55137703A JP S55137703 A JPS55137703 A JP S55137703A JP 4570579 A JP4570579 A JP 4570579A JP 4570579 A JP4570579 A JP 4570579A JP S55137703 A JPS55137703 A JP S55137703A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- phase shifter
- null point
- phase
- receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
- H01Q3/2611—Means for null steering; Adaptive interference nulling
- H01Q3/2617—Array of identical elements
- H01Q3/2623—Array of identical elements composed of two antennas
Abstract
PURPOSE:To obtain a disturbing wave removing unit where adjustment is easy and the null point is not changed for a receiving frequency, by connecting a variable phase shifter to one of two sets of antennas and by connecting a phase correcting circuit to the other and by synthesizing two signals in a synthesizer. CONSTITUTION:Signals from antennas 1 and 2 are taken out through switch 7, and, for example, the signal from antenna 2 and the signal from antenna 1 are supplied to difference synthesizing circuit 4 through variable phase shifter 5 and phase correcting circuit 3 respectively. The output of circuit 4 is transmitted from terminal 3 to a TV receiver, and a DC voltage is superposed onto this transmission line in the receiver side and is supplied to phase shifter 5 through choke coil 35 and coil 31, thereby controlling a varactor diode. Circuit 3 and phase shifter 5 are constituted by LPF types, and the capacity of circuit 3 is fixed. If the impedance and the capacity of circuit 3 and phase shifter 5 are set to prescribed values, phase difference becomes fixed throughout all bands of the receiving frequency, and the null point is held fixed, so that the user can change the null point near the receiver to remove the disturbing wave easily.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4570579A JPS55137703A (en) | 1979-04-13 | 1979-04-13 | Antenna unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4570579A JPS55137703A (en) | 1979-04-13 | 1979-04-13 | Antenna unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55137703A true JPS55137703A (en) | 1980-10-27 |
Family
ID=12726774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4570579A Pending JPS55137703A (en) | 1979-04-13 | 1979-04-13 | Antenna unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137703A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1829160A1 (en) * | 2004-12-21 | 2007-09-05 | Electronics and Telecommunications Research Institute | Ultra isolation antenna |
US7512384B2 (en) | 2002-11-01 | 2009-03-31 | Fujitsu Limited | Control unit and a control method |
-
1979
- 1979-04-13 JP JP4570579A patent/JPS55137703A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7512384B2 (en) | 2002-11-01 | 2009-03-31 | Fujitsu Limited | Control unit and a control method |
EP1829160A1 (en) * | 2004-12-21 | 2007-09-05 | Electronics and Telecommunications Research Institute | Ultra isolation antenna |
EP1829160A4 (en) * | 2004-12-21 | 2008-08-13 | Korea Electronics Telecomm | Ultra isolation antenna |
US7868837B2 (en) | 2004-12-21 | 2011-01-11 | Electronics And Telecommunications Research Institute | Ultra isolation antenna |
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