US2297266A - Lecher wire system - Google Patents

Lecher wire system Download PDF

Info

Publication number
US2297266A
US2297266A US279128A US27912839A US2297266A US 2297266 A US2297266 A US 2297266A US 279128 A US279128 A US 279128A US 27912839 A US27912839 A US 27912839A US 2297266 A US2297266 A US 2297266A
Authority
US
United States
Prior art keywords
lecher
wires
wire system
disc
conductors
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
US279128A
Other languages
English (en)
Inventor
Vieweger Martin
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
Application granted granted Critical
Publication of US2297266A publication Critical patent/US2297266A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/02—Lecher resonators

Definitions

  • the oscillatory circuits are formed of so-called concentrated capacities and inductances, because the wave-lengths are too small to allow of arranging a concentrated capacity or condenser. Also, in the case of very short wavelengths the self-capacities of the coils and the self-inductances of the condensers as well as of the leads thereto are particulars that require consideration in certain respects. Therefore, the oscillatory circuits are formed as Lecher wire systems. that is to say, systems comprising two wires which are parallel to each other. The length of such circuits is a multiple of M4, where A is the operative wavelength. Since the Lecher wire system has to be tuned it has previously been necessary to provide for varying the effective length 01' the Lecher wires to effect the tuning.
  • the Lecher wire system is not altered in this way, thus being left constant in length.
  • the free ends of the Lecher wires are bent into a. semicircular shape and a disc or plate is arranged to be inserted into the interspace of the wire ends so shaped.
  • This disc which to such end may be rotatable or slidable, has a dielectric constant e greater than that of air, a fact which may be expressed by the relation 1.
  • the arrangement is such that the disc does not contact with the Lecher wires.
  • the disc ma for instance, be of a ceramic material of the kind. having a high e-value and small losses, or may consist of polystyrolene or the like.
  • the invention provides a number of semicircular wire stages each comprising semicircular wiresandadiscadaptedtobeinsertedinto the interspace thereof to tune such stages in the aforesaid manner.
  • FIG. 1 is a diagrammatic viewshowing an elementary form of systems as provided by the invention
  • Fig. 2 is a diagrammatic representation illustrating a number of such ele entary forms, these constituting stages adapted to be interconnected,
  • Fig. 3 is a di arammatic view showing a modiflcation of the arrangement represented in Fig. l.
  • L denotes Lecher wires which in Figs. 1 and 2 are shown to be semicircular at their free ends.
  • a rotatable disc H is arranged to be turned into the interspace of these wire ends without contacting therewith.
  • switches S, Fig. 2 may be arranged to allow of selectively elongating or shortening the wires L by either adding or disconnecting emicircular divisions L. Each such division has a disc H for tuning it.
  • Figs. 1 and 2 are susceptible of many variations.
  • a plate as shown in Fig. 3 may be provided, which is composed of two parts A, B each having an e-value diiierent from that of the other part. This plate, adapted to be moved indifferent directions as indicated by the arrows, enables the effective e-value to be continually increased.
  • a Lecher wire system comprising a pair of Lecher wires and means for eilecting continuous tuning of said Lecher wires by varying the capacity per unit length of said wires from one end thereof comprising a body having a dielectric constant greater than unity mounted for selective adjustable insertion between said wires from one end thereof and along the length thereof, said member being in insulated relation with respect to said wires.
  • a system comprising a pair of Lecher wires

Landscapes

  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Particle Accelerators (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
US279128A 1938-06-22 1939-06-14 Lecher wire system Expired - Lifetime US2297266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE214057X 1938-06-22

Publications (1)

Publication Number Publication Date
US2297266A true US2297266A (en) 1942-09-29

Family

ID=5816628

Family Applications (1)

Application Number Title Priority Date Filing Date
US279128A Expired - Lifetime US2297266A (en) 1938-06-22 1939-06-14 Lecher wire system

Country Status (5)

Country Link
US (1) US2297266A ( )
BE (1) BE434940A ( )
CH (1) CH214057A ( )
FR (1) FR856395A ( )
GB (1) GB530097A ( )

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436427A (en) * 1943-02-18 1948-02-24 Sperry Corp Impedance transformer
US2485884A (en) * 1945-08-29 1949-10-25 Richard R Stoddart High-frequency receiving system having inductively coupled butterfly type circuits
US2717362A (en) * 1950-05-02 1955-09-06 Hazeltine Research Inc High-frequency wave-signal tuning device
DE940998C (de) * 1944-04-28 1956-03-29 Siemens Ag Schwingkreis, insbesondere fuer ultrakurze elektrische Wellen
US2833995A (en) * 1952-05-08 1958-05-06 Itt Microwave transmission line
US2894225A (en) * 1956-10-29 1959-07-07 Jr James Elmer Myers Tuning apparatus
US2915624A (en) * 1956-08-21 1959-12-01 Motorola Inc Radiosonde

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE533239A ( ) * 1952-05-08
DE963528C (de) * 1954-11-13 1957-05-09 Lorenz C Ag Abstimmanordnung unter Verwendung von nach Art der gedruckten Schaltungen ausgebildeten unsymmetrischen Mikrowellenbandleitungen
GB767067A (en) * 1955-01-26 1957-01-30 Standard Telephones Cables Ltd Microwave transmission line phase shifter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436427A (en) * 1943-02-18 1948-02-24 Sperry Corp Impedance transformer
DE940998C (de) * 1944-04-28 1956-03-29 Siemens Ag Schwingkreis, insbesondere fuer ultrakurze elektrische Wellen
US2485884A (en) * 1945-08-29 1949-10-25 Richard R Stoddart High-frequency receiving system having inductively coupled butterfly type circuits
US2717362A (en) * 1950-05-02 1955-09-06 Hazeltine Research Inc High-frequency wave-signal tuning device
US2833995A (en) * 1952-05-08 1958-05-06 Itt Microwave transmission line
US2915624A (en) * 1956-08-21 1959-12-01 Motorola Inc Radiosonde
US2894225A (en) * 1956-10-29 1959-07-07 Jr James Elmer Myers Tuning apparatus

Also Published As

Publication number Publication date
CH214057A (de) 1941-03-31
GB530097A (en) 1940-12-04
FR856395A (fr) 1940-06-12
BE434940A ( )

Similar Documents

Publication Publication Date Title
US2297266A (en) Lecher wire system
US2246928A (en) Tuned circuit
US3327255A (en) Interdigital band-pass filters
US2192532A (en) Directive antenna
US2177272A (en) Short wave electron discharge system
US2196272A (en) Transmission network
US2541375A (en) Wave filter
US2542416A (en) Short wave tuning system
US2563243A (en) Indoor television antenna
US1955093A (en) Oscillation circuit for electric waves
US2729794A (en) High frequency apparatus
US3496498A (en) High-frequency filter
US2317503A (en) Transmission line
ES389482A1 (es) Perfeccionamientos en sintonizadores de uhf.
GB756381A (en) Improvements in or relating to slot aerials
US2519524A (en) Multiple-tuned wave-selector system
US3899757A (en) Square turning meander line
US3763447A (en) High frequency helical filter
US1778395A (en) Coupling device
US2702372A (en) Delay line
US2832892A (en) Tuning device for ultra-high frequency circuits
US3657671A (en) Hybrid tunable cavity resonator
US2649577A (en) Transmission line tuning device for electronic systems
US2104915A (en) Tuned oscillator circuit
US2896178A (en) Wave transmission system