GB997028A - Improvements relating to acoustic and radio-frequency measuring systems including screened chambers - Google Patents
Improvements relating to acoustic and radio-frequency measuring systems including screened chambersInfo
- Publication number
- GB997028A GB997028A GB1246963A GB1246963A GB997028A GB 997028 A GB997028 A GB 997028A GB 1246963 A GB1246963 A GB 1246963A GB 1246963 A GB1246963 A GB 1246963A GB 997028 A GB997028 A GB 997028A
- Authority
- GB
- United Kingdom
- Prior art keywords
- march
- radio
- acoustic
- path
- room
- 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
- 239000006096 absorbing agent Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
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
- G01R29/105—Radiation diagrams of antennas using anechoic chambers; Chambers or open field sites used therefor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
997,028. Testing aerials. SIEMENS & HALSKE A.G. March 29, 1963 [March 29, 1962; March 30, 1962], No. 12469/63. Heading H4A. A screened room for testing acoustic or radio wave radiators is so dimensioned that, if r 1 is the distance between radiator and receiver and # 0 is the angle between once-reflected radiations and the direct radiator-receiver path, # 0 is not greater than 42 degrees, width a=r 1 /tan # 0 , length b=r 1 /sin # 0 and the height of the room above the direct path is b/2; the radiatorreceiver path is so arranged that reflexion paths r<SP>1</SP> 2a and r<SP>1</SP> 2b differ. The room may be entirely lined with wave absorbers or may be selectively lined as described in Specification 997,027; for radio waves the absorbers may be conical structures of graphite embedded in a substance in which the electrical resistance decreases from apex to base, the latter being at the wall surface, or may be plates of resinbonded paper arranged in an orthogonal manner and provided with electrically conductive layers, to form waveguide-like structures.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES78796A DE1261912B (en) | 1962-03-29 | 1962-03-29 | Box-shaped, shielded measuring room for measuring electromagnetic or acoustic waves |
| DES78797A DE1212175B (en) | 1962-03-30 | 1962-03-30 | Arrangement of the radiation source and radiation measurement location in a screened measurement room used to measure electromagnetic or acoustic waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB997028A true GB997028A (en) | 1965-06-30 |
Family
ID=25996828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1246963A Expired GB997028A (en) | 1962-03-29 | 1963-03-29 | Improvements relating to acoustic and radio-frequency measuring systems including screened chambers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB997028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024251371A1 (en) * | 2023-06-09 | 2024-12-12 | Huawei Technologies Co., Ltd. | Calibration and testing apparatus for radio-frequency devices |
-
1963
- 1963-03-29 GB GB1246963A patent/GB997028A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024251371A1 (en) * | 2023-06-09 | 2024-12-12 | Huawei Technologies Co., Ltd. | Calibration and testing apparatus for radio-frequency devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3739392A (en) | Base-band radiation and reception system | |
| US2408435A (en) | Pipe antenna and prism | |
| GB997028A (en) | Improvements relating to acoustic and radio-frequency measuring systems including screened chambers | |
| CH397011A (en) | Insulated antenna mast of large height for antennas in the VHF or decimeter wave range | |
| CN208423181U (en) | A kind of Beidou GPS navigation conformal antenna structure | |
| GB884889A (en) | Improvements in or relating to aerial systems | |
| US3380019A (en) | Pressure-gradient hydrophone | |
| JPS53136941A (en) | Antenna device | |
| US1666834A (en) | Radiant-energy collector for aerials | |
| JPS56144645A (en) | Diversity antenna device for portable radio equipment | |
| VINOGRADOVA et al. | Effect of signal fluctuations on directive properties of a multi-element receiving antenna(Signal fluctuation effect on directional properties of multidipole receiving antenna, calculating radiation pattern) | |
| US2115791A (en) | Coupling device | |
| REDDY | Limiting polarization of high frequency radio waves, passing vertically downward through the ionosphere | |
| CH482316A (en) | Half-wave pylon antenna for the emission of medium radio waves | |
| Venevtsev | Application of the m-distribution to an analysis of the influence of the aperture error on the directional characteristics of antenna arrays(Rapid fadings intensity distribution formula for analysis of aperture phase and amplitude errors influence on antenna arrays directional characteristics) | |
| HOFFMAN | Equations and notations are obtained for the analysis of radiation patterns from spherical antenna array of discrete elements | |
| GB1142662A (en) | Broadband receiving antenna | |
| US1922116A (en) | Antenna array | |
| KRANK et al. | Antennas and power transmission lines of the FM 1800/600 direction-finding system/Antennen und Energieleitungen des Richtfunksystems FM 1800/6000/(Antennas and power transmission lines of FM 1800/6000 direction finding system, discussing radio field attenuation) | |
| SEELEY | Derivation of radiation-pattern characteristics of two- and three-loop superdirective antenna arrays | |
| NUTTALL | Estimation of noise directionality spectrum(Estimation of noise directionality spectrum directly from cross-spectral matrix of received processes at hydrophone array elements) | |
| SU148160A1 (en) | The method of electrical method of induction using high frequencies | |
| LUSIGNAN | Detection of the electron component of the solar wind by measuring the polarization of high frequency radio waves propagating through the particle stream | |
| ELAM et al. | Discussion of the protection of pressure sensing instruments from high frequency pressure impulses | |
| MA | Directivity of uniformly spaced optimum endfire arrays with equal sidelobes(Calculation of uniformly spaced and progressively phased antenna arrays of isotropic elements so that radiation pattern is endfire with equal sidelobes) |