GB1325771A - Aerial current monitoring - Google Patents

Aerial current monitoring

Info

Publication number
GB1325771A
GB1325771A GB967370A GB1325771DA GB1325771A GB 1325771 A GB1325771 A GB 1325771A GB 967370 A GB967370 A GB 967370A GB 1325771D A GB1325771D A GB 1325771DA GB 1325771 A GB1325771 A GB 1325771A
Authority
GB
United Kingdom
Prior art keywords
slot
cylinder
resistor
cable
series
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
Application number
GB967370A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB1325771A publication Critical patent/GB1325771A/en
Expired legal-status Critical Current

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)
  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1325771 Aerials STANDARD TELEPHONES & CABLES Ltd 19 April 1971 [27 Feb 1970] 9673/70 Heading H4A In a method for sampling the current flowing in a radiating element, a notch or slot is provided in the element and is coupled by a transmission line and matching means to a utilization means. As described, a unipole aerial comprises a metallic cylinder 10 supported above a larger grounded metallic cylinder 11. A coaxial feeder 13 is brought up through the cylinder 11 and is connected to it and to the cylinder 10. A transverse slot 14 is cut in the cylinder 11, for current sampling purposes, and a monitoring coaxial cable 15 is connected thereto. A resistor having the same magnitude as the characteristic impedance of the cable 15 is connected either in series or in parallel with said cable, to provide matching. When in series, the resistor may either be located at the slot or at a distance of (#/2 - #) therefrom, where # = wavelength at the mean frequency of operation and # = a correction for the inductance of the slot. When in parallel, the resistor is located at a distance of (#/4 - #) from the slot (Fig. 2, not shown). In another embodiment, the invention is applied to a dipole aerial (Fig. 1, not shown).
GB967370A 1970-02-27 1970-02-27 Aerial current monitoring Expired GB1325771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB967370 1970-02-27

Publications (1)

Publication Number Publication Date
GB1325771A true GB1325771A (en) 1973-08-08

Family

ID=9876551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB967370A Expired GB1325771A (en) 1970-02-27 1970-02-27 Aerial current monitoring

Country Status (3)

Country Link
DE (1) DE2109079C3 (en)
FR (1) FR2085599B1 (en)
GB (1) GB1325771A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129604C2 (en) * 1991-09-06 2000-03-16 Thomcast Gmbh Sendeanlagen Fue Method for determining the radiation pattern of a short-wave curtain antenna

Also Published As

Publication number Publication date
FR2085599A1 (en) 1971-12-24
DE2109079C3 (en) 1975-05-15
DE2109079B2 (en) 1974-08-29
DE2109079A1 (en) 1971-09-02
FR2085599B1 (en) 1976-02-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee