GB1207595A - Aerials - Google Patents

Aerials

Info

Publication number
GB1207595A
GB1207595A GB04347/68A GB1434768A GB1207595A GB 1207595 A GB1207595 A GB 1207595A GB 04347/68 A GB04347/68 A GB 04347/68A GB 1434768 A GB1434768 A GB 1434768A GB 1207595 A GB1207595 A GB 1207595A
Authority
GB
United Kingdom
Prior art keywords
sleeve
aerial
capacitors
march
gap
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
GB04347/68A
Inventor
Eric Geoffrey Chardin
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.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
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 Pye Ltd filed Critical Pye Ltd
Priority to GB04347/68A priority Critical patent/GB1207595A/en
Priority to US807277A priority patent/US3594805A/en
Priority to NL6904565A priority patent/NL6904565A/xx
Publication of GB1207595A publication Critical patent/GB1207595A/en
Expired 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
    • H01Q7/06—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 core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Landscapes

  • Burglar Alarm Systems (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1,207,595. Aerials. PYE Ltd. 14 March, 1969 [25 March, 1968], No. 14347/68. Heading H4A. A magnetic dipole aerial comprises a ferrite rod 1, around which is a conductive sleeve 2 having a gap 3 throughout its length. Capacitors C 1 , C 2 + C 3 , and C 4 are uniformly spaced along the gap 3, and are connected to the edges thereof. Means are provided for adjusting the inductance of the sleeve 2, so that the aerial may be resonant at a desired frequency and, as described, this consists of a longitudinal slot 6 at the back of the sleeve 2, which may be wholly or partially short-circuited by an axially slidable further sleeve 5. The sleeves 2, 5 may be made of beryllium copper and be silver-plated. A tab 7 on the sleeve 5 facilitates movement for adjustment. The sleeve 5 may be finally secured by means of an adhesive. The aerial is fed by connections across the capacitor C 3 , and matching is obtained by suitably proportioning the values of the capacitors C 2 , C 3 .
GB04347/68A 1968-03-25 1968-03-25 Aerials Expired GB1207595A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB04347/68A GB1207595A (en) 1968-03-25 1968-03-25 Aerials
US807277A US3594805A (en) 1968-03-25 1969-03-14 Ferrite rod antenna with longitudinally split sleeve
NL6904565A NL6904565A (en) 1968-03-25 1969-03-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB04347/68A GB1207595A (en) 1968-03-25 1968-03-25 Aerials

Publications (1)

Publication Number Publication Date
GB1207595A true GB1207595A (en) 1970-10-07

Family

ID=10039562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB04347/68A Expired GB1207595A (en) 1968-03-25 1968-03-25 Aerials

Country Status (3)

Country Link
US (1) US3594805A (en)
GB (1) GB1207595A (en)
NL (1) NL6904565A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117182A (en) * 1982-03-23 1983-10-05 Multitone Electronics Plc Aerial arrangements
FR2707124A1 (en) * 1993-07-01 1995-01-06 Telediffusion Fse Ferrite aerial for a portable receiver
EP0689301A1 (en) * 1994-06-24 1995-12-27 Telediffusion De France System of omnidirectional antennae having angular and polarisation diversity

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367475A (en) * 1979-10-30 1983-01-04 Ball Corporation Linearly polarized r.f. radiating slot
US5014071A (en) * 1989-06-30 1991-05-07 Motorola, Inc. Ferrite rod antenna
US5164737A (en) * 1991-03-28 1992-11-17 Motorola, Inc. Single turn ferrite rod antenna with mounting structure
JPH05218726A (en) * 1991-11-13 1993-08-27 Seiko Epson Corp Ferrite antenna
JP3481575B2 (en) * 2000-09-28 2003-12-22 寛児 川上 antenna
US20110139877A1 (en) * 2009-12-14 2011-06-16 Szakelyhidi David C Radio Frequency Identification Tag for Use on Metal Objects
US8350695B2 (en) 2010-06-24 2013-01-08 Lojack Operating Company, Lp Body coupled antenna system and personal locator unit utilizing same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE627249A (en) * 1962-01-19
US3453634A (en) * 1966-05-17 1969-07-01 Dictaphone Corp Loopstick antennas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117182A (en) * 1982-03-23 1983-10-05 Multitone Electronics Plc Aerial arrangements
FR2707124A1 (en) * 1993-07-01 1995-01-06 Telediffusion Fse Ferrite aerial for a portable receiver
EP0689301A1 (en) * 1994-06-24 1995-12-27 Telediffusion De France System of omnidirectional antennae having angular and polarisation diversity
FR2721756A1 (en) * 1994-06-24 1995-12-29 Telediffusion Fse An omnidirectional transmit-receive antenna system with angular diversity and polarization.

Also Published As

Publication number Publication date
US3594805A (en) 1971-07-20
NL6904565A (en) 1969-09-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees