GB2274547A - Antenna tuning arrangement - Google Patents

Antenna tuning arrangement Download PDF

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Publication number
GB2274547A
GB2274547A GB9301183A GB9301183A GB2274547A GB 2274547 A GB2274547 A GB 2274547A GB 9301183 A GB9301183 A GB 9301183A GB 9301183 A GB9301183 A GB 9301183A GB 2274547 A GB2274547 A GB 2274547A
Authority
GB
United Kingdom
Prior art keywords
tune
delta
frequency
antenna
capacitor
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.)
Withdrawn
Application number
GB9301183A
Other versions
GB9301183D0 (en
Inventor
David Doroba
John Shrimpton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9301183A priority Critical patent/GB2274547A/en
Publication of GB9301183D0 publication Critical patent/GB9301183D0/en
Publication of GB2274547A publication Critical patent/GB2274547A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/04—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode
    • H01G5/14—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode due to longitudinal movement of electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

An antenna tuning arrangement comprises a capacitor which is adjustable to tune the antenna to a desired frequency. The capacitor comprises a first tubular element 6 which fits inside a second, larger, tubular element 7. The arrangement may work as an antenna in itself or it may be attached to an existing antenna such as a loop antenna. The capacitor is constructed of aluminium tubing and plastic. <IMAGE>

Description

DESCRIPTION The Delta Tune is a form of capacitor, it is constructed of aluminium tubing and plastic.
It consists of one aluminium tube element insulated, fitting inside a larger aluminium tube element. With a plastic stabiliser and a aluminium ground stabiliser.

Claims (1)

  1. The Delta Tune is a form of capacitor between the transmit and the ground ratio. It can be manipulated to any size for transmitting and receiving purposes.
    The ground of the Delta Tune balances the signal evenly from low frequency to high frequency. Once the frequency is balanced standing wave ratio is brought down by slightly moving the extension feed (6) thus making less signal reflection and the antenna very wide band.
    Tests have shown that anywhere on the radio spectrum the Delta Tune will work whether shortened or lengthened for an even match on the frequency your using. The Delta Tune can work as an aerial in itself or attached to an existing aerial.
    A test was performed showing that without moving the Delta Tune from the 26 - 27 mhz band the Delta Loop antenna covered the following: BAND FREQUENCY STANDING WAVE RATIO lOM 29.500 1.3
    28.000 1.3 llM 27.500 1.2
    27.000 1.1 15M 21.500 1.5
    21.000 1.8 20M 14.500 2.5
    14.000 3.0 By readjusting the Delta Tune you can tune into further frequencies.
GB9301183A 1993-01-21 1993-01-21 Antenna tuning arrangement Withdrawn GB2274547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9301183A GB2274547A (en) 1993-01-21 1993-01-21 Antenna tuning arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9301183A GB2274547A (en) 1993-01-21 1993-01-21 Antenna tuning arrangement

Publications (2)

Publication Number Publication Date
GB9301183D0 GB9301183D0 (en) 1993-03-10
GB2274547A true GB2274547A (en) 1994-07-27

Family

ID=10729093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9301183A Withdrawn GB2274547A (en) 1993-01-21 1993-01-21 Antenna tuning arrangement

Country Status (1)

Country Link
GB (1) GB2274547A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1547136A (en) * 1978-02-07 1979-06-06 Marconi Co Ltd Radio antennae
GB2125225A (en) * 1982-06-08 1984-02-29 Sven Ramstroem A loop antenna for radio communication
GB2130803A (en) * 1982-11-16 1984-06-06 Moratalla Joaquin Bel Improvements in antennae
GB2189081A (en) * 1986-04-09 1987-10-14 Shakespeare Co Monopole antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1547136A (en) * 1978-02-07 1979-06-06 Marconi Co Ltd Radio antennae
GB2125225A (en) * 1982-06-08 1984-02-29 Sven Ramstroem A loop antenna for radio communication
GB2130803A (en) * 1982-11-16 1984-06-06 Moratalla Joaquin Bel Improvements in antennae
GB2189081A (en) * 1986-04-09 1987-10-14 Shakespeare Co Monopole antenna

Also Published As

Publication number Publication date
GB9301183D0 (en) 1993-03-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)