US2410656A - Tuned ultra high frequency transformer - Google Patents

Tuned ultra high frequency transformer Download PDF

Info

Publication number
US2410656A
US2410656A US492149A US49214943A US2410656A US 2410656 A US2410656 A US 2410656A US 492149 A US492149 A US 492149A US 49214943 A US49214943 A US 49214943A US 2410656 A US2410656 A US 2410656A
Authority
US
United States
Prior art keywords
transformer
line
primary
tuned
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
US492149A
Inventor
Edward W Herold
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority to US492149A priority Critical patent/US2410656A/en
Application granted granted Critical
Publication of US2410656A publication Critical patent/US2410656A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/201Filters for transverse electromagnetic waves
    • H01P1/202Coaxial filters

Description

1/1/1111 III 1 11, 1111111111111 E. W., HEROLD TUNED ULTRA HIGH FREQUENCY TRANSFORMER Filed June 24, 1943 INPUT MPl/TLl/Vf (Ittorneg Nov. 5, 194a Patented Nov. 5, 1946 TUNED ULTRA HIGH FREQUENCY TRANSFORMER Edward W. Herold, Kingston, N. 5., assignor to Radio Corporation of America, a corporation of Delaware Application June 24, 1943, Serial No. 492,149
7 Claims. I
This invention relates generally to ultra-high frequency apparatus and more particularly to a tuned transformer for ultra-high-frequency energy wherein both primary and secondary portions may be separately tuned to resonate at the operating frequency and wherein the coupling between the primary and the secondary portions may be adjusted to any predetermined coupling factor.
' Ultra-high frequency receivers and transmitters often require that interstage or antenna coupling circuits be tunable to the operating frequency, and that the response of the coupling transformer have predetermined band width characteristics. Transformation of the type required may beaccomplished by employing a concentric line transformer of the type to be described in detail hereinafter.
The primary portion of the transformer may be tuned by inserting a variable series capacitor in the center conductor of the primary portion of the transmission line. Such a capacitor may be adjusted by a control shaft extending through a shorting plug interposed at the adjacent end of the concentric line transformer unit. Input to the primary portion of the transformer unit may be provided by tapping an input transmission line to a predetermined point along the primary portion of the concentric line transformer.
. The secondary portion of the transformer unit is separated from the primary portion thereof by means of an apertured shorting plug disposed transversely of the concentric line transformer at a predetermined distance from the connection of the input transmission line. The remaining end of the secondary portion of the transformer unit is left open. The center conductor of the secondary portion may, for example, be connected to the control electrode of a high frequency thermionic tube, while the outer concentric conductor thereof may be connected to the cathode or grounded circuit of the tube.
The secondary portion of the transformer unit also'may be tuned capacitively. The secondary tuning may be accomplished by securing a fiat capacitive plate to the center conductor, and adjustablypositioning a second capacitive plate at a predetermined distance therefrom, which may be varied through the side of the outer conductor. It will be seen that the adjustment will provide a shunt capacity between the inner and outer conductors of the secondary portion,
Coupling between the primary and secondary portions of .the transformer unit may be accomplished by providing one'or more apertures of predetermined cross-sectional area in the shorting plug separating the primary and secondary portions. The size or number of the apertures, or both, may be adjusted externally by means of an annular apertured plate pivoted parallel to the apertured shorting plug. Coincidence of the apertures of the shorting plug and the annular apertured plate will provide coupling between the primary and secondary portions of the transformer. The coupling factor will be proportional to a function of the coinciding aperture areas of the apertured plates.
Among the objects of the invention are to provide an improved ultra-high-frequency tuned transformer. Another object of the invention is to provide an improved ultra-high-frequency, tuned, concentric-line transformer including means for tuning separately the primary and secondary portions thereof, means for providing predetermined coupling to the primary portion from an external circuit, and means for providing predetermined coupling between the primary and secondary portions of the transformer. A further object of the invention is to provide an improved ultra-high frequency concentric line transformer having capacitive tuning of the primary separate capacitive tuning of the secondary portion, and an adjustable coupling between the primary and secondary portions. An additional object of the invention is to provide an improved ultra-high-frequency, concentric line transformer including an externally adjustable series capacitively tuned primary portion, an externally adjustable parallel capacitively tuned secondary portion and adjustableapertured means for controlling the coupling factor between the primary and secondary portionsthereof. A further object is to provide an improved high-frequency filter comprisinga plurality of tuned sections of coaxial line which are mutually coupled through apertures in conductive means interposed between the line conductors to form said sections.
The invention will be described in further detail by reference to the accompanying drawing of which Figure 1 is a crosssectional view of a first embodiment thereof, Figure 2 ,is an elevational sectional View, taken along the section line II-II, of the adjustable coupling elements of Figure l, and-Figure 3 is a cross-sectional view of a second embodiment thereof. Similar reference numerals are applied to similar elements throughout the drawing.
Referring to Figure 1, the coupling transformer comprises a concentric line including an outer "conductor l and a coaxially disposed inner con- 3 ductor 2. An input transmission line including an outer conductor 3 and coaxially disposed inner conductor 4 is tapped to the corresponding conductors 2 of the transformer concentric line at predetermined points thereon. A shorting plug is disposed within one end of the outer conductor of the transformer concentric line. An adjusting shaft '6, having an externally adjustable control knob I, extends through an aperture in the shorting plug 5, and terminates in a capacitive conductive plate 8. A similar capacitive conductive plate 9 terminates the adjacent end of the inner conductor 2 of the transformer concentric line. The spacing between the capacitive plates 8 and t may be varied by adjusting the external the transformer concentric line between the outer I and inner conductors 2 thereof at a point intermediate the c'omiect'ion of the input line to the'trans'former line and the remaining open end of the transformer line. The second shorting plug Ill includes an aperture for the center conductor 2 of the transformer line and one or more additional apertures to provide coupling between 'the primary and secondary-portions of the transformer line. The open ended portions of the transformer secondary may be connected, for example, to the control electrode and cathode of a thermionic tube II, or to any other type of load device. As illustrated, the center conductor 2 is connected to the control electrode of the tube II,
and the outer con-centric conductor is connected tothe cathode. v
Tuning of the secondary portion of the transformer line is accomplished by means of a second threaded control shaft H which extends, and is threaded, normally through the outer concentric conductor I The external end of the second control shaft I2 is terminated in a second control knob |3 while the internal end thereof is terminated in a third capacitive conductive plate I4. A fourth capacitive conductive plate It is secured to the adjacent side of the inner conductor 2 of the secondary portion of the transformer line. External adjustment of the second control knob |3 may thereby provide adjustable spacing between the third and fourth capacitive plates l4, It; to provide adjustable parallel capacitive tuning between the inner and outer conductors of the transformer secondary portion. It should be understood that both tuned sections may be tuned similarly, and both sections may be either open or closed at the extremities thereof.
The Coupling factor between the primary and secondary portions of the transformer line may be adjusted externally bymeans of a conductive adjusting plate H3, a portion of which extends through the outer concentric conductor I. The adjusting plate It may be pivoted to the shorting plug Ill adjacent the apertur therein. The adjusting plate I6 is provided with a plurality 'of apertures l8, l3, which may bemade to coincide with the larger aperture in the shorting plug ID, by rotating the adjusting plate It about its pivot 23. It should be understood that if the shorting plug ll) includes a pluralityof apertures, similar to the aperture illustrated herein, a plurality of such adjusting plates might be employed or other known mechanical means might be utilized to control simultaneously the effective aperture of each of the apertured portions of the shorting plug H1.
Figure 2 shows the second shorting plug l and the adjusting plate 5 pivoted thereto. It will be seen that various sized apertures |8, |9, 2|, 22, 23, 24 may be rotated about the axis to coincide with the larger aperture I! in the second shorting plug Hi. If desired, some type of locking device, not shown, may be provided for fixing the position of the adjusting plate It when the desired aperture has been selected to provide the desired coupling factor.
Figure 3 is a modification of the invention providing a tuned multi-stage filter network comprising a coaxial line having an outer conductor and an inner conductor 3|. The ends of the coaxial line are terminated by shorting plugs 32, 33. A plurality of apertured conductive means 34, are interposed between the line conductors 30, 3| to provide the separate filler stages which are coupled through fixed or adjustable apertures 36, 31 therein. Adjustable capacitors C1, C2 and C3 are employed to tune separately each of the filter stages. An input coaxial line 38 is connected, as shown in Fig. 1, to the input filter stage, and an output coaxial line 39 is connected similarly to the output filter stage. The shorting plugs 32, 33 may be omitted if desired, or the stages may be tuned by series capacitors in the center conductor 3|, as shown in Fig. 1.
Thus the invention described comprises an improved ultra-high frequency concentric line transformer or filter network having capacitive means for tuning separately the input and output or intermediate portions thereof and additional means for adjusting the coupling between the several portions of the transformer or network. It should be understood that the devices may be employed similarly as a tuned coupling unit between any other input and load devices customarily utilized in ultra-high frequency circuits.
1 claim as my invention:
1. A tuned high-frequency circuit comprising a coaxial-line section having an inner and an outer conductor, apertured conductive means joining said conductors intermediate the ends thereof so as to form separately resonant portions, at least one aperture in said -conductive means being disposed intermediate said inner andouter conductors. whereby said resonant portions are electrically coupled through said aperture and separate capacitive means interposed between said conductors for separately tuning each of said portions.
2. A tuned high-frequency circuit comprising a coaxial-line section having an inner and an outer conductor, a plurality of aperturecl conductive means joining said conductors at points intermediate their ends so as to form a plurality of separatelyresonant portions, at least one aperture in each of said conductive means being disposed intermediate said inner and outer conductors whereby adjacent ones of said resonant portions are electrically coupled through said apertures, and separate capacitive means interposed between said line conductors for tuning each of said resonant portions.
3. A tuned high-frequency transformer comprising a coaxial line section including a pair of concentric conductors, conductive means terminatingone end of said line, apeitu'red conductive means terminating said conductors at a point intermediate the ends thereof to provide primary and secondary transformer portions, at least one aperture in said conductive means being disposed intermediate said inner and "outer conductors whereby said resonant port-ions have a coupling factor which is a function of the aperture area, capacitive means interposed in series with the center one of said concentric conductors for tuning said primary transformer portion and capacitive means interposed between said concentric conductors for tuning said secondary transformer Portion.
4. A tuned high frequency transformer comprising a coaxial line section including a pair of concentric conductors, conductive means terminating one end of said line, apertured conductive means terminating said conductors at a point intermediate the ends thereof to provide primary and secondary transformer portions, at
least one aperture in said conductive means being disposed intermediate said inner and outer conductors whereby said resonant portions have a coupling factor which is a function of the aperture area, capacitive means interposed in series with the center one of said concentric conductors and adjustable externally of said line section for tuning said primary transformer portion and capacitive means interposed between said concentric conductors and adjustable externally of said line section for tuning said secondary transformer portion.
5. Apparatus of the type described in claim 4 including means adjustable externally of said concentric conductors for adjusting the effective aperture area of said apertured conductive means for controlling the coupling factor between said primary and said secondary transformer portions.
6 A tuned high frequency transformer comprising a coaxial line section, apertured conductive means terminating said conductors at a point intermediate the ends thereof to provide primary and secondary transformer portions, at least one aperture in said conductive means being disposed intermediate said inner and outer conductors whereby said resonant portions have a coupling factor which is a function of the aperture area, means for tuning said primary transformer portion and means for tuning said secondary transformer portion, means for coupling said primary transformer portion to an input circuit, and means for coupling said secondary transformer portion to a load circuit.
'7. Apparatus of the type described in claim 4 including means for coupling said primary transformer portion to an input circuit, and means for coupling said secondary transformer portion to a load circuit.
EDWARD W. HEROLD.
US492149A 1943-06-24 1943-06-24 Tuned ultra high frequency transformer Expired - Lifetime US2410656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US492149A US2410656A (en) 1943-06-24 1943-06-24 Tuned ultra high frequency transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492149A US2410656A (en) 1943-06-24 1943-06-24 Tuned ultra high frequency transformer

Publications (1)

Publication Number Publication Date
US2410656A true US2410656A (en) 1946-11-05

Family

ID=23955141

Family Applications (1)

Application Number Title Priority Date Filing Date
US492149A Expired - Lifetime US2410656A (en) 1943-06-24 1943-06-24 Tuned ultra high frequency transformer

Country Status (1)

Country Link
US (1) US2410656A (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504109A (en) * 1946-10-04 1950-04-18 Westinghouse Electric Corp Dielectric heating with cavity resonator
US2516056A (en) * 1946-02-26 1950-07-18 Rca Corp Method for tuning cascade tuned circuits
US2527664A (en) * 1945-11-08 1950-10-31 Hazeltine Research Inc Wave-signal translating system for selected band of wave-signal frequencies
US2577511A (en) * 1946-05-24 1951-12-04 Seymour B Cohn Tunable radio frequency filter
US2603707A (en) * 1944-12-21 1952-07-15 Sperry Corp Coaxial line support
US2630488A (en) * 1944-11-27 1953-03-03 Albert M Clogston Cavity resonator tuning device
US2702884A (en) * 1949-09-27 1955-02-22 Raytheon Mfg Co Adjustable power divider with directional coupling
US2708719A (en) * 1949-02-17 1955-05-17 Nat Cylinder Gas Co High frequency generator
US2712050A (en) * 1951-12-27 1955-06-28 Nat Cylinder Gas Co Flux guide and gate arrangements
US2715211A (en) * 1950-02-02 1955-08-09 Rca Corp Ultra high frequency tuning systems
US2735069A (en) * 1956-02-14 Directional coupler
US2760169A (en) * 1951-05-23 1956-08-21 Itt Microwave filters
US2762017A (en) * 1951-08-07 1956-09-04 Itt Ultrahigh frequency filter
US2763783A (en) * 1946-04-05 1956-09-18 Howard O Lorenzen High frequency oscillator
US2781493A (en) * 1945-12-27 1957-02-12 Bruce B Cork Cavity resonator devices
US2872569A (en) * 1955-09-16 1959-02-03 Charles H Bredall Antenna-detector coupling unit
US2938178A (en) * 1956-05-08 1960-05-24 Babakian Jacob Cyclic control of r. f. energy transmission and reception
DE975422C (en) * 1950-01-06 1961-11-23 Siemens Ag Electrical filter arrangement consisting of coaxial resonance circuits
DE977567C (en) * 1950-01-06 1967-03-16 Siemens Ag Electric band filter for very short electromagnetic waves
FR2380646A1 (en) * 1977-02-14 1978-09-08 Murata Manufacturing Co HYPERFREQUENCY FILTER
EP0013204A1 (en) * 1978-12-22 1980-07-09 Thomson-Csf Frequency-band filter
US4618838A (en) * 1984-02-27 1986-10-21 Sony Corporation Impedance adjusting element for a microstrip circuit
US5072198A (en) * 1989-07-10 1991-12-10 Vickers, Incorporated Impedance matched coaxial transmission system

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735069A (en) * 1956-02-14 Directional coupler
US2630488A (en) * 1944-11-27 1953-03-03 Albert M Clogston Cavity resonator tuning device
US2603707A (en) * 1944-12-21 1952-07-15 Sperry Corp Coaxial line support
US2527664A (en) * 1945-11-08 1950-10-31 Hazeltine Research Inc Wave-signal translating system for selected band of wave-signal frequencies
US2781493A (en) * 1945-12-27 1957-02-12 Bruce B Cork Cavity resonator devices
US2516056A (en) * 1946-02-26 1950-07-18 Rca Corp Method for tuning cascade tuned circuits
US2763783A (en) * 1946-04-05 1956-09-18 Howard O Lorenzen High frequency oscillator
US2577511A (en) * 1946-05-24 1951-12-04 Seymour B Cohn Tunable radio frequency filter
US2504109A (en) * 1946-10-04 1950-04-18 Westinghouse Electric Corp Dielectric heating with cavity resonator
US2708719A (en) * 1949-02-17 1955-05-17 Nat Cylinder Gas Co High frequency generator
US2702884A (en) * 1949-09-27 1955-02-22 Raytheon Mfg Co Adjustable power divider with directional coupling
DE977567C (en) * 1950-01-06 1967-03-16 Siemens Ag Electric band filter for very short electromagnetic waves
DE975422C (en) * 1950-01-06 1961-11-23 Siemens Ag Electrical filter arrangement consisting of coaxial resonance circuits
US2715211A (en) * 1950-02-02 1955-08-09 Rca Corp Ultra high frequency tuning systems
US2760169A (en) * 1951-05-23 1956-08-21 Itt Microwave filters
US2762017A (en) * 1951-08-07 1956-09-04 Itt Ultrahigh frequency filter
US2712050A (en) * 1951-12-27 1955-06-28 Nat Cylinder Gas Co Flux guide and gate arrangements
US2872569A (en) * 1955-09-16 1959-02-03 Charles H Bredall Antenna-detector coupling unit
US2938178A (en) * 1956-05-08 1960-05-24 Babakian Jacob Cyclic control of r. f. energy transmission and reception
FR2380646A1 (en) * 1977-02-14 1978-09-08 Murata Manufacturing Co HYPERFREQUENCY FILTER
EP0013204A1 (en) * 1978-12-22 1980-07-09 Thomson-Csf Frequency-band filter
FR2445037A1 (en) * 1978-12-22 1980-07-18 Thomson Csf FREQUENCY BAND FILTER
US4311975A (en) * 1978-12-22 1982-01-19 Thomson Csf Frequency band filter
US4618838A (en) * 1984-02-27 1986-10-21 Sony Corporation Impedance adjusting element for a microstrip circuit
US5072198A (en) * 1989-07-10 1991-12-10 Vickers, Incorporated Impedance matched coaxial transmission system

Similar Documents

Publication Publication Date Title
US2410656A (en) Tuned ultra high frequency transformer
US2272062A (en) Coaxial line ultra high frequency amplifier
US2140770A (en) Electrical coupling device
US2500875A (en) Tunable high-frequency tank circuit
USRE20189E (en) Oscillation circuit for electric
US2341346A (en) High frequency coupling circuit
US2530089A (en) Ultra high frequency resonant circuit
US2483893A (en) Tunable unit for high-frequency circuit
US2427110A (en) Ultra high frequency wide-band tuner
US2617038A (en) Ultrahigh-frequency device
US2401634A (en) Ultra high frequency coupling device
US2594167A (en) Ultrahigh-frequency bridge circuits
US2519524A (en) Multiple-tuned wave-selector system
US2111373A (en) Permeability-tuned device
US2390768A (en) Variable selectivity amplifier
US2525452A (en) Means for coupling concentric cavity resonators
US2141242A (en) Ultra short wave system
US2408896A (en) Microwave multiband tuner
US2326519A (en) Ultra high frequency coupling means
US2532263A (en) High-frequency coupling transformer
US2843683A (en) Television tuner input circuit
US2312211A (en) Tuning system
US2795699A (en) Ultrahigh-frequency tuner
US2590864A (en) High-frequency radio apparatus
US2419882A (en) Wide band interstage coupling network