US2403302A - Ultra high frequency apparatus - Google Patents

Ultra high frequency apparatus Download PDF

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Publication number
US2403302A
US2403302A US477167A US47716743A US2403302A US 2403302 A US2403302 A US 2403302A US 477167 A US477167 A US 477167A US 47716743 A US47716743 A US 47716743A US 2403302 A US2403302 A US 2403302A
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signal
source
wave
path
discharge
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US477167A
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Martin R Richmond
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RCA Corp
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RCA Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/034—Duplexers

Definitions

  • This' invention' ⁇ relates generally.' to. ultrafhigh.
  • the com-v mon :feature of providing: simultaneous control: of. a current discharge path'. and* ⁇ a; wave. ltransmis-- sion. path, such as', for example,.a wave guide yor a resonant;chamber; ⁇
  • This feature permits higherA power control. since itsubstamtially eliminates'the: power surge, :or: spike' transmission pathY when the. wave pathalone; keyedl.. .Other modications of the invention. are: disclo'sed and claimed. in. applicants copending. app'licati'orrSerial. ⁇ No.; 508,332", namelyd October' V30,. m43, :as faidivisiona ofthefinstanti application.
  • Stillf another object of the invention isA tol provide an improved method of.' and means for-'controlling simultaneously a powerj circuit and. av wave trans mission circuit- ⁇ through a dielectricv Vwave guide.
  • a transmitter I# is sun plied'wit'h ⁇ operating potential' from atransmittbiz power source. 2; through. a. duplexi switching dei. ⁇
  • An antenna; or other. Signal'. source; 4i is connected; tofthef. inputof a wave.- transmission circuit 5: su'cliras,for examplegmm wave guide or' a, coaxial transmission line. mier wave transmission', circuit. 5y also is connected. through: the duplex switchingY device 3 to ⁇ a nai. responsive device such. as ⁇ a. radio receiversv is A source ofi keying( pulses 'lf is connected. tos-the; duplex switching. device; 3... When. a; keying' pulse from thee keying source 'lf isapplie'df.
  • the wave transmission circuit:y 5 is eiectivelv.interrupted to isolate the? receiver ii' from thefzsignalisourceell; .Durinxi intervals between. keyingf pulses! from the-#kever circuit '1, the poweroircuit from the transmitter? power. source 24 to thee transmitter l; isfintermpted' at .the switcli'e. while' the wave transmissiomciza. cuitlthroughthe transmission. line 5r is completed from: the: signal source; 4f toa-the signalreceiver if.'
  • Figure 2 is a: cross-seclfrequency current l rent discharge path onant aperture formed.. thereby. I resonance effectively .blocks ,wave transmission throughfthewave guidazwmie it also; provides ,a u the cathode 8 to the anode. 6' .which maybe.. utilized. for the transmission of 2 vto the transmitg conductive path from l terlxl..A M.
  • Illu may befevacuated toiforma vacuum type ther...
  • switching device comprising means pro-- viding a wave transmission path for coupling said signal source to said signalresponsive device and providing. a .current dis;
  • the endsv ⁇ of thewaveguide 5 shouldextend as nantf. cavity1 40 .whichincludes ythe currentdischarge device. .consisting .of the anode 6, the. grid Il:and the .cathode 8.
  • 13 mayaalso beemployed tobypass ultra-high vfrequency L currents inducedv in the grid electrode y, l'
  • a duplex currentdischarge switching device comprising. Imeans providing ⁇ al wave trans-l mission path Afor coupling vsaid signal sourceto.
  • a duplex electrondischargeswitchingzde., vice..'comprsng means providing.: aVV signal Ywave transmission pathiforfcoupling saidsignal source to said receiver and means forselectivelyformingacurrent discharge path .transversely across said signal wave transmission pathto. effectively block said signaltransmissiom and meansforini-i tiating a current ⁇ discharge n.- said device: for -ap-f.
  • a duplex current discharge device comprising a resonant chamber for coupling said signal source to said signal responsive device, and means for selectively forming a current discharge within said resonant chamber to vary the resonant frequency of said chamber, and means for initiating said current discharge within said device for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately for quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
  • a duplex current discharge switching device in combination with a signal generator, a signal responsive device, a source of operating potential for said signal generator and a signal source for said signal responsive device, the method comprising establishing a current discharge within said device, utilizing said current discharge for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
  • a duplex current discharge switching device in combination with a signal generator, a signal responsive device, a source of operating potential for said signal generator and a signal source for said signal responsive device, the method comprising keying said device for establishing a current discharge within saidr device, utilizing said current discharge for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
  • a duplex current discharge switching device for use with a power circuit and a signal responsive device, said switching device comprising means providing a wave transmission path for signals to said signal responsive device, means providing a series current path transversely of said wave transmission path in said switching device for said power circuit, and means for initiating a current discharge in said switching device for completing said series path and effectively interrupting said signal transmission path for isolating said signals from said signal responsive device, and for alternately quenching said current discharge for interrupting said series path and effectively completing said signal transmission path.
  • a duplex current discharge switching device for use with a signal generator, a source of operating Ipotential for said generator, a signal source and a signal responsive device responsive to said signal source, said switching device-comprising means providing a signal wave transmission path for signals from said signal source to said signal responsive device, means providing a series path transversely of said wave transmission path in said switching device for operating potentials from said potential source to said generator, and means for initiating a current discharge in said switching device for applying said operating potential to said generator and effectively interrupting said signal wave transmission path thereby isolating said signal source from said signal responsive device, and for alternately quenching said current discharge for removing said operating potential from said generator and eifctively completing said signal transmission pa 9.
  • a duplex current discharge switching device for use with a power circuit and a signal responsive device, said switching device comprising waveguide means providing a wave transmission path for signals to said signal responsive device, means comprising an electron discharge device disposed within said waveguide and providing a series path transversely of said wave transmission path through said switching device for said power circuit, and keying means operable upon said electron discharge device for initiating a current discharge in said switching device for completing said series path and effectively interrupting said signal wave transmission path for isolating said signals from said signal responsive device, and for alternately quenching said curf rent discharge for interrupting said series path and effectively completing said signal transmission path.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electrotherapy Devices (AREA)

Description

JUIYZ, 1946. M. R. RICHMOND ULTRA-HIGH FREQUENCY APPARATUS leaf/rse Filed Feb. 25., 1943 THA/M/rf lllllllllllllllll s s s s s g i KEYS? e W e mfr. f6 ew M www r l@ s L@ w E w. M m mm n l'mventor (ttomeg Patented July 2, 1946 oFF UTRA men: FREQUENCY APPARATUS Martin'R. Richmond; Brooklyn, N.v Y.Y,v,assign'o1. to Radici Corporation. of America, a` corporation.
of. Delaware 9l claims. l
This' invention'` relates generally.' to. ultrafhigh.
frequency apparatusandlmore particularly' toduiplexswitching` apparatus. for controlling. simuls taneouslv separate power" and; signal circuits' applied to dinerent components. of. 'a communica.- tfion' system.
. In ultra-high frequency communication systems itisoftenfdesirableto control simultaneously the application. of potentials derivedy ironia power source to' asignalI generator and tuY isolate; selectivelya; receiver from a signal source.. Due tof-the pcculiaritiesainherent iniultra-highirequency apparatus..conventionalswitching means` areseldom entirely satisfactorydueto undesiredreactive com'- ponents Whichare; thus. introduced into therassociatedv circuits; The instant. invention. contemplates the use of; a. current. discharge dev-ice which may be keyed to.l provide a. conductive. path for connecting the' power source: tol the signal. generator while' simultaneously` presenting. an. open: circuit to the signal path between the received.
signal source and: `the signal. receiver. Various? modication'szof the invention willibevdescribedl in. detail hereinafter. However;1 all involve. the com-v mon :feature: of providing: simultaneous control: of. a current discharge path'. and*` a; wave. ltransmis-- sion. path, such as', for example,.a wave guide yor a resonant;chamber;` This feature: permits higherA power control. since itsubstamtially eliminates'the: power surge, :or: spike' transmission pathY when the. wave pathalone; keyedl.. .Other modications of the invention. are: disclo'sed and claimed. in. applicants copending. app'licati'orrSerial.` No.; 508,332", iiled October' V30,. m43, :as faidivisiona ofthefinstanti application.
' Among. theobjectsof thezinventionare tos providera new andmpmvedgmethodi of .andim'eans for: providing simultaneous switch-ingiof aapower: sourceanctawave transmission path. .Another object. ofcthe; inventionais tol provide/ansimprovedi method: ot and. .means forx providing: 1a.- duplex' intra-high;y frequency switching `device."Y which comprises a current: discharge path.r for: a apower source and a wave attenuator tor a signal: source.. Another object of) thei invention ist'o provide. an: improvedmethod or andi-meansior controlling simultaneously .thel conductivity of azpower transl missioncircuit and' the attenuation off-ani ultrahighl frequency.i wave;y transmission circuit. Stillf another object of the invention isA tol provide an improved method of.' and means for-'controlling simultaneously a powerj circuit and. av wave trans mission circuit-` through a dielectricv Vwave guide. A Still another object oftheinvention topro-f sirr'iinprovect method of and?means-i0124 conintroduced.. into: the.' wave:
completed. throughithe switch 321:0
l 'a portion of the-"wave 2'. trolling a power circuit quencywave tra-usmission: circuit through circad-y nant chamber. by,y providing: a current. discharge;
Withinsaid chamber tovaryfthe'impedance of at the operating frequency..
The invention will. be: described in. greater de-v tail byA reference: to'.- the: accompanying drawing of: which. Figure 1. isia block agrario of. oneiembodb. ment. of the invention; tional:- view or arr. embodiment-f of` the. invention; Figure:` 3l is a` cross-sectional. view along; theilinef AA of Figure 2; and Figure 4 is a cross-sectiontlz,`
view of. a. modioation of invention..l
referencev numerals are: applied, to= merits: throughout the. drawing:V y
Referring' to; Figure 1-, a transmitter I# is sun plied'wit'h` operating potential' from atransmittbiz power source. 2; through. a. duplexi switching dei.`
vicei 3i of. any of the types to bedescribed'imdez tail hereinafter. An antenna; or other. Signal'. source; 4i is connected; tofthef. inputof a wave.- transmission circuit 5: su'cliras,for examplegmm wave guide or' a, coaxial transmission line. mier wave transmission', circuit. 5y also is connected. through: the duplex switchingY device 3 to` a nai. responsive device such. as` a. radio receiversv is A source ofi keying( pulses 'lf is connected. tos-the; duplex switching. device; 3... When. a; keying' pulse from thee keying source 'lf isapplie'df. to thej duplex: switch- 3;.the power circuit from the power. sourcev mitten I1. Simultaneously, the wave transmission circuit:y 5 is eiectivelv.interrupted to isolate the? receiver ii' from thefzsignalisourceell; .Durinxi intervals between. keyingf pulses! from the-#kever circuit '1, the poweroircuit from the transmitter? power. source 24 to thee transmitter l; isfintermpted' at .the switcli'e. while' the wave transmissiomciza. cuitlthroughthe transmission. line 5r is completed from: the: signal source; 4f toa-the signalreceiver if.'
ing; a'.- projection. .6i extending: transversely amsn path. The wave guide is entirelyenclosediwithin an evacuatedf envelope Il.. Opposite the. projection: it iis; ar secomkpmjection'e 8-comprising; a'A cathode; surface. which is heated` i by: a: heater winding' 9".. A. grid' element: lili fist diri-iV posed in'- th'e aperture formed in the gindeibetweem the.:` cathode 8. and the: projection. 6. Separate leads are broughtj out; through seals fortha,oath.-` ode; heater-,.-grid-anclf wave. guide elemen It should bev understood .that the devicejust described' consti-tutes a: thermionic discharge tube* in which the projectionl @represents theanode of the" tube. The shape 'ofthe aperture-formed and an. ultra-high.- im
Figure 2 is a: cross-seclfrequency current l rent discharge path onant aperture formed.. thereby. I resonance effectively .blocks ,wave transmission throughfthewave guidazwmie it also; provides ,a u the cathode 8 to the anode. 6' .which maybe.. utilized. for the transmission of 2 vto the transmitg conductive path from l terlxl..A M.
derstood .that the envelope. Illu may befevacuated toiforma vacuum type ther...
. closelyas'possible tothe .tured elements 3l, 32 mayv the desired selectivity. in thetuning ofthe res- .477,176'fi1edieb1o1ery 2.5, 1945 .Cepaeitive 818.--, 3` are 'disposed adjacent ,the supports lments I2,y
of the gridll'jto bypass'"effectively` the ultra-high components induced therein. In operation, if negatively with respect toV the 4cathode 8, and the anode 6 is positive with respect to the potential on the cathode 8, substantiallynoelectron ldischarge will occur across thegap formed b'etween the cathode and anode. Since the aperture is resonant at quency, it provides an Vefficient transferV path the grid electrode Il is biased should be understood that the wave transmission path is through the particular wave transmission device described, while the power transmission path is between the cathode and anode or current discharge electrodes. It should also be understood that in each of the modifications described, the occurrence of a current discharge, whethermel'ctrfonic or i'riicjffwill ,provida conducting patl'whichwillcomplete:'the circuit between the power sourceand the transmitter, while Vsimultaneously effectively blockingthe transmission .ot
signal waves through the device from the signal source tothe 'signal receiver.
is Y
the wave f transmission ,fre.. A
`through the wave guide for waves introducedI However.. if a positive pothe g'ridelectrode Il, such into the wave guide. l tential Y is applied.` .to i asf'keying pulses occurs across .the gap between i theY cathode 8 :and-.the anodezl which effectively L changes the resonantcharacteristics of' the respowerlf'from fthe power source 2 Itishould mionic tubewithin-.thewave guide, or: it `may be filled with lan `inert charge1tube..: .If the tube.just-,described is of the vacuumztypaaeffectivekeying of anytype of trans.. be accomplished .by
mitterI power source may .means `ofpositive keyingpulses derived fromthe keyer circuit '1,providing is; applied to .the thusl .formed is Vof may only bekeyedy pulses; .and .interruption `of the Thyratron type, the circuit onby the positive keying the discharge .-pathi must; be'` accomplished byy reducing. the .positive potentialapplied to the anode 6. Such a condi-l tion=,will prevail if the transmitter power source. providesV valternating potentials .or` pulsating po--JI from thekeyer-circuit-1,` a cur-Y,
`gas at `low. pressure to pro-` videsaftube ofv theThyratron type of gaseous dis-` a normal` negative bias 3 grid. lli :'However, if the tube .This change in i Thus the-'invention described comprises new and improved methods of and means for switching simultaneously=a power circuit and a wave transmission` circuit in response to pulses derived discharge. switching device comprising means pro-- viding a wave transmission path for coupling said signal source to said signalresponsive device and providing. a .current dis;
means for selectively charge transversely of .said wave transmission path, and means .for .initiating aV current .discharge -within said rdevice rfor applying said op-` erating potential` to-said signal generator and .eff ectively isolating vsaid. signal .responsive `device from .said signal source, and for -alternately.. Vquenchingsaid current discharge thus .effectively isolating said signal generator .from vsaidpoten:
tial .source and effectively. coupling said signal're-A sponsive device to said signal source.
tentialszof varying .voltage between .somepredetermined maximum andzero value. Preferably, the endsv` of thewaveguide 5 shouldextend as nantf. cavity1 40 .whichincludes ythe currentdischarge device. .consisting .of the anode 6, the. grid Il:and the .cathode 8. Capaciti've elements I2- Y' and-|13 mayaalso beemployed tobypass ultra-high vfrequency L currents inducedv in the grid electrode y, l'|;;Z'IAi current .discharge occurring withinthe resonantf'cavity 4U will changethe. resonant characteristicsV thereof to provide a circuit of extremely. .thigh impedance. to waves offthe signal. frequency. ...The size. ofthe ,apertures in the vaperbe selected to provide onantcavity `lili, as .described in the `copendingap-A.
plcation'mentioned heret-ofore.v i
l i Ing-.al1 ...or :.thei.. devices described.; heretofore,
envelope I0 `in order that;
it' e.
' signal source, and for V2. In a systemv of the type including a vradio transmitter, a radio receiver, a source of operat; ing potential for said transmitter, and .a signal source'for said receiver;v the improvement com.. prising a duplex currentdischarge switching device comprising. Imeans providing `al wave trans-l mission path Afor coupling vsaid signal sourceto. n
providing said receiver and means for selectively a current discharge. transversely .of-said wave transmission'path, and means for initiating.Y a current dischargeV within. said device vfor apply-y ing said operating 'potential toV said transmitter and.eectivelyzisolating said receiver. from said alternately quenching said' current dischargethus eiectively isolatingisaid transmitterv from said potential source and eiec. tivelyY coupling saidreceiver to said signal source. 3.1111 a system of the type including. a radio transmitter, a ra'dioreceiver, a source of operataV ing: potential for said transmitter, and a .signal sourcev for said receiver, the improvement. c0111. prising. a duplex electrondischargeswitchingzde., vice..'comprsng means providing.: aVV signal Ywave transmission pathiforfcoupling saidsignal source to said receiver and means forselectivelyformingacurrent discharge path .transversely across said signal wave transmission pathto. effectively block said signaltransmissiom and meansforini-i tiating a current` discharge n.- said device: for -ap-f. plying said operating potential to said transmite ter and effectively isolating .said Y receiveniroxn said signal source, vand alternately forequenching said-current discharge in said devcethusetfec: tively isolating said transmitter; from,.said.;p0. tential sourcev and effectively couplingsaidre-f, ceiver. to said signal source.: 3 xr. ..;'1.1.,
.4.111 asystem .of the. type mamelles-.asiatici generator, a signal responsive device, a source of operating potential for said signal generator, and a signal source for said signal responsive device, the improvement comprising a duplex current discharge device comprising a resonant chamber for coupling said signal source to said signal responsive device, and means for selectively forming a current discharge within said resonant chamber to vary the resonant frequency of said chamber, and means for initiating said current discharge within said device for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately for quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
5. In a duplex current discharge switching device in combination with a signal generator, a signal responsive device, a source of operating potential for said signal generator and a signal source for said signal responsive device, the method comprising establishing a current discharge within said device, utilizing said current discharge for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
6. In a duplex current discharge switching device in combination with a signal generator, a signal responsive device, a source of operating potential for said signal generator and a signal source for said signal responsive device, the method comprising keying said device for establishing a current discharge within saidr device, utilizing said current discharge for applying said operating potential to said signal generator and effectively isolating said signal responsive device from said signal source, and alternately quenching said current discharge thus effectively isolating said signal generator from said potential source and effectively coupling said signal responsive device to said signal source.
7. A duplex current discharge switching device for use with a power circuit and a signal responsive device, said switching device comprising means providing a wave transmission path for signals to said signal responsive device, means providing a series current path transversely of said wave transmission path in said switching device for said power circuit, and means for initiating a current discharge in said switching device for completing said series path and effectively interrupting said signal transmission path for isolating said signals from said signal responsive device, and for alternately quenching said current discharge for interrupting said series path and effectively completing said signal transmission path.
8. A duplex current discharge switching device for use with a signal generator, a source of operating Ipotential for said generator, a signal source and a signal responsive device responsive to said signal source, said switching device-comprising means providing a signal wave transmission path for signals from said signal source to said signal responsive device, means providing a series path transversely of said wave transmission path in said switching device for operating potentials from said potential source to said generator, and means for initiating a current discharge in said switching device for applying said operating potential to said generator and effectively interrupting said signal wave transmission path thereby isolating said signal source from said signal responsive device, and for alternately quenching said current discharge for removing said operating potential from said generator and eifctively completing said signal transmission pa 9. A duplex current discharge switching device for use with a power circuit and a signal responsive device, said switching device comprising waveguide means providing a wave transmission path for signals to said signal responsive device, means comprising an electron discharge device disposed within said waveguide and providing a series path transversely of said wave transmission path through said switching device for said power circuit, and keying means operable upon said electron discharge device for initiating a current discharge in said switching device for completing said series path and effectively interrupting said signal wave transmission path for isolating said signals from said signal responsive device, and for alternately quenching said curf rent discharge for interrupting said series path and effectively completing said signal transmission path.
MARTIN R. RICHMOND.
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459152A (en) * 1943-06-19 1949-01-18 Delbert A Deisinger Electronic valve
US2468151A (en) * 1943-04-19 1949-04-26 Int Standard Electric Corp Coupling arrangement for ultra high frequency circuits
US2473834A (en) * 1944-01-25 1949-06-21 Raytheon Mfg Co Coupling between transmitter and wave guide system
US2505534A (en) * 1943-04-27 1950-04-25 Gen Electric Device for controlling the propagation of energy in a wave guide
US2524179A (en) * 1944-04-13 1950-10-03 Edwin G Schneider Tuned ultra high frequency thermionic detector
US2544842A (en) * 1943-06-23 1951-03-13 James L Lawson Overload protection of highfrequency receivers
US2549639A (en) * 1945-06-23 1951-04-17 Rca Corp Antenna switching system
US2567701A (en) * 1944-06-02 1951-09-11 Gen Electric Ultra high frequency coupling device for wave guides
US2582205A (en) * 1943-09-07 1952-01-08 Longacre Andrew Compound protective device for radio detection system
US2598914A (en) * 1947-01-29 1952-06-03 Csf Aperiodic electronic blocking valve
US2603743A (en) * 1945-06-07 1952-07-15 James L Lawson Electronic duplexing device
US2606249A (en) * 1945-05-02 1952-08-05 Bruce B Cork Tunable cavity resonator transmitreceive device
US2638504A (en) * 1943-06-11 1953-05-12 Emi Ltd High-frequency electrical device having gastight envelopes
US2697800A (en) * 1951-01-16 1954-12-21 Sylvania Electric Prod Electric discharge device
US2735092A (en) * 1955-04-04 1956-02-14 Guide space
US2738418A (en) * 1942-03-09 1956-03-13 English Electric Valve Co Ltd Transmission control devices adapted as a switch
US2765404A (en) * 1951-12-14 1956-10-02 Frank R Arams Microwave filter
US2813999A (en) * 1948-10-26 1957-11-19 Jr Owen F Foin High power r.-f. switch tube
US2981946A (en) * 1947-09-30 1961-04-25 Rca Corp Antenna feed system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738418A (en) * 1942-03-09 1956-03-13 English Electric Valve Co Ltd Transmission control devices adapted as a switch
US2468151A (en) * 1943-04-19 1949-04-26 Int Standard Electric Corp Coupling arrangement for ultra high frequency circuits
US2505534A (en) * 1943-04-27 1950-04-25 Gen Electric Device for controlling the propagation of energy in a wave guide
US2638504A (en) * 1943-06-11 1953-05-12 Emi Ltd High-frequency electrical device having gastight envelopes
US2459152A (en) * 1943-06-19 1949-01-18 Delbert A Deisinger Electronic valve
US2544842A (en) * 1943-06-23 1951-03-13 James L Lawson Overload protection of highfrequency receivers
US2582205A (en) * 1943-09-07 1952-01-08 Longacre Andrew Compound protective device for radio detection system
US2473834A (en) * 1944-01-25 1949-06-21 Raytheon Mfg Co Coupling between transmitter and wave guide system
US2524179A (en) * 1944-04-13 1950-10-03 Edwin G Schneider Tuned ultra high frequency thermionic detector
US2567701A (en) * 1944-06-02 1951-09-11 Gen Electric Ultra high frequency coupling device for wave guides
US2606249A (en) * 1945-05-02 1952-08-05 Bruce B Cork Tunable cavity resonator transmitreceive device
US2603743A (en) * 1945-06-07 1952-07-15 James L Lawson Electronic duplexing device
US2549639A (en) * 1945-06-23 1951-04-17 Rca Corp Antenna switching system
US2598914A (en) * 1947-01-29 1952-06-03 Csf Aperiodic electronic blocking valve
US2981946A (en) * 1947-09-30 1961-04-25 Rca Corp Antenna feed system
US2813999A (en) * 1948-10-26 1957-11-19 Jr Owen F Foin High power r.-f. switch tube
US2697800A (en) * 1951-01-16 1954-12-21 Sylvania Electric Prod Electric discharge device
US2765404A (en) * 1951-12-14 1956-10-02 Frank R Arams Microwave filter
US2735092A (en) * 1955-04-04 1956-02-14 Guide space

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