GB614419A - Improvements in radio antennas - Google Patents

Improvements in radio antennas

Info

Publication number
GB614419A
GB614419A GB1458/46A GB145846A GB614419A GB 614419 A GB614419 A GB 614419A GB 1458/46 A GB1458/46 A GB 1458/46A GB 145846 A GB145846 A GB 145846A GB 614419 A GB614419 A GB 614419A
Authority
GB
United Kingdom
Prior art keywords
conductors
fins
cylindrical
diameter
dipole
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
GB1458/46A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB614419A publication Critical patent/GB614419A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

614,419. Aerials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 16, 1946, No. 1458. Convention date, Aug. 31, 1944. [Class 40 (vii)] A short-wave broad-band dipole aerial comprises two cylindrical conductors 1 and 3, each of length #/6 and diameter #/16, to which are attached coaxial circular fins of conductive material 15, 17, 19 and 15<1>, 17<1>, 19<1> normal to the axis of the conductors and spaced at intervals of #/32, the central fins 17 and 17<1> having a diameter of #/5 and the other fins having a diameter of #/7, whereby the impedance is maintained relatively high so that the aerial may be matched directly to available transmission lines having characteristic impedances of the order of 50-70# without the use of special impedance transformers. The fins may be regarded as providing a distributed inductance which resonates with the capacitative reactance of the cylindrical conductors over a broad band. Suitable dimensions are given for a dipole operating over a frequency band centred at 600 Mc/s. The two conductors are supported in colinear relationship upon an insulating member 5 which is secured by means of a clamp 7 to a tubular support 9 and a pair of coaxial transmission lines 11 and 13 extend through the support with their outer conductors connected to the support and their inner conductors connected to the adjacent ends of the cylindrical conductors, Figs. 2 and 3 (not shown). In Fig. 4 (not shown), the dipole is mounted coaxially with the focal line of a cylindrical parabolic reflector of focal length .3# and aperture 4.5#.
GB1458/46A 1944-08-31 1946-01-16 Improvements in radio antennas Expired GB614419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US552095A US2411976A (en) 1944-08-31 1944-08-31 Broad band radiator

Publications (1)

Publication Number Publication Date
GB614419A true GB614419A (en) 1948-12-15

Family

ID=24203914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1458/46A Expired GB614419A (en) 1944-08-31 1946-01-16 Improvements in radio antennas

Country Status (2)

Country Link
US (1) US2411976A (en)
GB (1) GB614419A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636123A (en) * 1945-09-17 1953-04-21 Thure E Hanley Electromagnetic shielding apparatus
US2508438A (en) * 1945-10-16 1950-05-23 Douglas W Wilson Broad band antenna
US2492989A (en) * 1946-02-09 1950-01-03 Farnsworth Res Corp Directive ultra high frequency antenna
GB619868A (en) * 1946-03-19 1949-03-16 Noel Meyer Rust Improvements in or relating to aerial arrays and feeder arrangements for use therewith
US2635187A (en) * 1946-03-29 1953-04-14 Dorne Arthur Broad band antenna
US2445336A (en) * 1946-06-05 1948-07-20 Us Sec War Antenna mounting
US2503278A (en) * 1947-03-21 1950-04-11 Raytheon Mfg Co Energy radiation apparatus
US2512725A (en) * 1948-05-20 1950-06-27 Antenna construction
US2558145A (en) * 1948-05-20 1951-06-26 Jr Wesley C Mock Antenna
US2648768A (en) * 1948-12-29 1953-08-11 Rca Corp Dipole antenna
US2495579A (en) * 1949-03-05 1950-01-24 William T Ferris Antenna
NL76969C (en) * 1950-05-03

Also Published As

Publication number Publication date
US2411976A (en) 1946-12-03

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