GB769067A - Improvements in or relating to monitoring means for reflector type aerials - Google Patents
Improvements in or relating to monitoring means for reflector type aerialsInfo
- Publication number
- GB769067A GB769067A GB15431/55A GB1543155A GB769067A GB 769067 A GB769067 A GB 769067A GB 15431/55 A GB15431/55 A GB 15431/55A GB 1543155 A GB1543155 A GB 1543155A GB 769067 A GB769067 A GB 769067A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cavity
- reflector
- aperture
- coupled
- frequency
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Waveguide Aerials (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
769,067. Testing aerial systems. STANDARD TELEPHONES & CABLES, Ltd. May 27, 1955 [May 28, 1954], No. 15431/55. Class 40(7) A monitoring arrangement for an aerial system having an extended metallic reflector comprises a cavity tunable to be resonant at the radiation frequency of the system disposed behind the reflector and coupled to the radiated energy through a suitable aperture. If the aerial system functions at a number of differing frequencies a plurality of cavities, one tuned to each frequency, may be provided coupled through separate apertures or through a joint aperture. The energy accepted by the or each resonant cavity is detected and applied to a meter or other device to provide an indication that radiation at 'the resonant frequency is. being effected. In the embodiment shown a paraboloidal reflector 2 of sheet metal or .wire mesh is energized by means of a dipole primary .element 8 backed by a disc and fed by means of a co-axial feeder 9. The primary element may be a waveguide horn if desired. The monitoring device comprises a tuned cavity 1 coupled to the radio field by means of aperture 3 and tuned to the correct frequency by plug 7. The energy accepted by the cavity is detected by a crystal rectifier connected to hair-pin lead 5 and feeding a meter. The reflector may form part of the wall of the cavity as shown or the cavity may be coupled to the aperture 3 by means of a tube. If this tube exceeds half an inch in length a loop or probe within the tube improves the coupling. The coupling aperture in the reflector have negligable effect on the radiation pattern as their dimensions are small compared with a wavelength. They may be protected by being filled or covered with dielectric material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU769067X | 1954-05-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB769067A true GB769067A (en) | 1957-02-27 |
Family
ID=3757654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15431/55A Expired GB769067A (en) | 1954-05-28 | 1955-05-27 | Improvements in or relating to monitoring means for reflector type aerials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB769067A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2228833A (en) * | 1988-11-28 | 1990-09-05 | * British Satellite Broadcasting Limited | Directional antenna |
CN107942149A (en) * | 2017-12-01 | 2018-04-20 | 昆山文特自动化设备有限公司 | A kind of antenna detection device applied to cambered surface vehicle glass |
-
1955
- 1955-05-27 GB GB15431/55A patent/GB769067A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2228833A (en) * | 1988-11-28 | 1990-09-05 | * British Satellite Broadcasting Limited | Directional antenna |
CN107942149A (en) * | 2017-12-01 | 2018-04-20 | 昆山文特自动化设备有限公司 | A kind of antenna detection device applied to cambered surface vehicle glass |
CN107942149B (en) * | 2017-12-01 | 2023-11-03 | 昆山文特自动化设备有限公司 | Antenna detection device applied to cambered surface automobile glass |
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