US2517238A - Radiating termination for a rhombic antenna - Google Patents

Radiating termination for a rhombic antenna Download PDF

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Publication number
US2517238A
US2517238A US663820A US66382046A US2517238A US 2517238 A US2517238 A US 2517238A US 663820 A US663820 A US 663820A US 66382046 A US66382046 A US 66382046A US 2517238 A US2517238 A US 2517238A
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US
United States
Prior art keywords
aerial
rhombic
conductors
terminals
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 - Lifetime
Application number
US663820A
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English (en)
Inventor
Posthumus Klaas
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.)
Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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Publication of US2517238A publication Critical patent/US2517238A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/06—Rhombic antennas; V-antennas

Definitions

  • This invention relates to an aerial system in which for example for the directional transmission of oscillations to be transferred use is made of a rhombic aerial in which only travelling waves must occur.
  • the occurrence of stationary waves is avoided in such an aerial or in other aerial systems in which solely travelling waves must occur by'terminating the end of the aerial system that is remote from the supply end by with the surge resistance of the aerial system.
  • the last-mentioned system exhibits an undue intense variation with the frequency of the oscillations to be transferred or received.
  • the invention has for its object to avoid this intense variation with frequency.
  • the second aerial system is arranged in the immediate proximity of theterminating end of the former aerial system and the ends of the former aerial system are connected direct to the input terminals of the second aerial system.
  • the invention is used with a rhombic aerial terminated by a dipole it is favourable to cross the sides of the rhombic aerial connected to the dipole aerial and constitute the dipole aerial by a single conductor extending between the termihating ends of the rhombic aerial. This does away with the need for earthing the free ends of the dipole halves.
  • the sides of the rhombic aerial that are connected to the feeder are, preferably crossed similarly to the other sides and the feeding ends of these sides are respectively connected with the feeder by two conductors jointly constituting a dipole antenna.
  • the former aerial system comprises a rhombic aerial I which is situated for example in a horizontal plane and which is constituted by two conductors 2, 2' having a length of, say, 4%, if x is the wavelength of the oscillations transmitted.
  • the connecting terminals ofthe rhombic aerial l situated on the right hand side are connected to a transmitter ⁇ whereas the conductors 2, 27 are connected at the left hand ends 5 and 5' respectively (terminating ends) with conductors 6, 6 each having.
  • a length of Mn which are earthed at the free end and jointly constitute a dipole antenna having an input resistance corresponding to the surge resistance of the rhombic aerial.
  • a a i By a proper choice of the angle formed by the conductors 2,601 2, B.” respectively this dipole is so arrangedthat the main directions of radiation coincide forboth aerial systems in accordance with the direction denoted by an arrow 1.
  • the second aerial. 6, 1601s arranged in the immediate proximity of the terminating ends 5, 5 of the rhombic aerial and the two aerial systems are interconnected direct i. e. without the use of a transmission line serving for the connection.
  • the sides of the rhombic aerial that are connected to the feeder are crossed similarly to the other sides and are connected to the feeder by two conductors 8, 8 respectively which jointly form a dipole aerial, as before, each having a length of AA.
  • the radiation diagram of the rhombic aerial thus obtained corresponds with 3 that of a normal rhombic aerial of similar form and dimensions Without crossed. sides.
  • the former aerial system is terminated each time by a second aerial system formed by a dipole constituted by two wires having a length of /41.
  • a second aerial system formed by a dipole constituted by two wires having a length of /41.
  • other known aerials may also be used to constituted the second aerial system.
  • each of, the conductors. of the rhombic aerial may be connected to a radiator having a length of &1 or else for example conical aerials may be used to constitute the second aerial system, the latter being eminently suitable for the present object in view of their frequency-impedance characteristic curve which has a substantially flat course for a wide frequency band.
  • An aerial system comprising a rhombic antenna constituted by a pair of conductors, means for energizing said system connected to the terminals of said conductors disposed at one end thereof, and a dipole radiator having its inner terminals connected directly to the terminals of said conductor disposed at the other end thereof and its outer terminals grounded, all elements of said system following the terminals at said one end of said conductors being radiating elements.
  • An aerial system comprising a rhombic antenna constituted by a pair of V-shaped conductors, said conductors at one. end thereof being crossed, a dipole radiator having its outer terminals directly connected to the terminals of said conductors disposed at said one end thereof and itsinnerterminals interconnected, and means for energizing said aerial system connected to the terminals of said conductors disposed.v at the otherend thereof, all elements of said system following the terminals of said conductors disposed at'said other end thereof beingradiating elements.
  • An aerial system comprising a rhombic an tenna constituted by a pair of V-shaped conductors, said conductors at one end thereof being crossed, a radiating member whose length is substantially equal to a half-wavelength of the operating frequency of said system, said member being directly connected between the terminals of said conductors at said one end thereof, and means for energizing said system connected to the terminals of said conductors disposed at the other end thereof, said member acting as a dipole, all elements of said system following the terminals at said other end of said conductors being radiating elements.
  • An aerial system comprising a rhornbic antenna constituted by a pair of V-shaped conductors and symmetrically arranged so that said conductors are crossed at both ends thereof, a pair of dipole radiators, the outer terminals of one of said radiators being connected directly to the terminals of said conductors disposed at one end thereof and the inner terminals of said. one of said radiators being interconnected, the outer terminals of the other of said radiators being con.- nected directly to the terminals. of said conductors disposed at the other end thereof, and means for energizing said system connected to the inner terminals of said other of said radiators, all elements of said system following the terminals of said conductors disposed at said other end thereof being radiating elements.
US663820A 1942-10-22 1946-04-22 Radiating termination for a rhombic antenna Expired - Lifetime US2517238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL618680X 1942-10-22

Publications (1)

Publication Number Publication Date
US2517238A true US2517238A (en) 1950-08-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US663820A Expired - Lifetime US2517238A (en) 1942-10-22 1946-04-22 Radiating termination for a rhombic antenna

Country Status (6)

Country Link
US (1) US2517238A (xx)
BE (2) BE618680A (xx)
DE (1) DE863681C (xx)
FR (1) FR899024A (xx)
GB (1) GB618680A (xx)
NL (1) NL61153C (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108390146B (zh) * 2017-12-28 2020-03-24 山东康威通信技术股份有限公司 一种地下隧道的远距离信号覆盖高增益天线及其制造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126295A (en) * 1934-04-25 1938-08-09 Western Electric Co Antenna system
US2131108A (en) * 1936-04-28 1938-09-27 Rca Corp Short wave communication system
FR833529A (fr) * 1937-06-15 1938-10-24 Thomson Houston Comp Francaise Perfectionnements aux antennes directionnelles
US2157159A (en) * 1937-03-24 1939-05-09 Rca Corp Antenna system
US2297925A (en) * 1940-04-06 1942-10-06 Rca Corp Antenna system
US2366195A (en) * 1942-11-23 1945-01-02 Standard Telephones Cables Ltd Antenna array
US2379260A (en) * 1943-06-15 1945-06-26 Press Wireless Inc Antenna system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126295A (en) * 1934-04-25 1938-08-09 Western Electric Co Antenna system
US2131108A (en) * 1936-04-28 1938-09-27 Rca Corp Short wave communication system
US2157159A (en) * 1937-03-24 1939-05-09 Rca Corp Antenna system
FR833529A (fr) * 1937-06-15 1938-10-24 Thomson Houston Comp Francaise Perfectionnements aux antennes directionnelles
US2297925A (en) * 1940-04-06 1942-10-06 Rca Corp Antenna system
US2366195A (en) * 1942-11-23 1945-01-02 Standard Telephones Cables Ltd Antenna array
US2379260A (en) * 1943-06-15 1945-06-26 Press Wireless Inc Antenna system

Also Published As

Publication number Publication date
BE452813A (xx)
GB618680A (en) 1949-02-25
FR899024A (fr) 1945-05-15
NL61153C (xx)
DE863681C (de) 1953-01-19
BE618680A (fr) 1962-12-14

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