Patent US3693103A successfully refreshed from Google Patents.
US3693103A
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Wideband detector for use in coaxial transmission lines
Assignee: Fei Microwave Inc
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Filing: 1971-08-06
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Granted: 1972-09-19
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Expires: 1991-08-06
Abstract
Abstract Coaxial line apparatus forming a termination and detector for high frequency signals. An input coaxial transmission line has an inner conductor and an outer conductor. The input coaxial transmission line is branched into a load transmission line and a parallel video transmission line. The load transmission line has inner and outer conductors and a matching impedance connected between the inner and outer conductors for terminating the load transmission line. The parallel transmission line has a separate outer conductor and inner conductive means. The inner conductive means include a crystal diode mounted at an angle with respect to the axis of the parallel transmission line outer conductor. The parallel transmission line outer conductor has an apertured portion substantially aligned with the crystal diode so that the crystal diode can be inserted or removed through the apertured portion. The parallel transmission line also includes additional impedances for attenuating relatively high frequency signals.
Inventors
- 👤 Robert B Mouw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:55
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
220 words
In a high frequency wideband detector for measuring the properties or values of an electromagnetic signal in a coaxial transmission line path, a first coaxial transmission line through which said electromagnetic signal is passed, a load resistance terminating said transmission line and connected between the inner conductor and outer conductor thereof, means serving to match said load resistance to thereby prevent development of standing waves on said coaxial transmission line, means forming a junction on said first transmission line prior to said load resistance, a second coaxial transmission line connected to said junction and formed of inner and outer conductors separate from said inner and outer conductors of said first coaxial transmission line, a detecting element positioned in said second transmission line and connected to the center conductor of said first transmission line, said detecting element having an input impedance substantially higher than said first transmission line impedance whereby said second transmission line has no appreciable effect upon said first transmission line, means associated with said detecting element for maintaining the overall impedance of said detecting element and said last named means at a substantially constant value over a wide frequency range, a video output transmission line connected to the other side of said detecting element and an RF return bypass capacitor connected across the video transmission line to ground.
Claim 2
Dependent Claim
220 words
In a high frequency wideband detector for measuring the properties or values of an electromagnetic signal in a coaxial transmission line path, a first coaxial transmission line through which said electromagnetic signal is passed, a load resistance terminating said transmission line and connected between the inner conductor and outer conductor thereof, means serving to match said load resistance to thereby prevent development of standing waves on said coaxial transmission line, means forming a junction on said first transmission line prior to said load resistance, a second coaxial transmission line connected to said junction and formed of inner and outer conductors separate from said inner and outer conductors of said first coaxial transmission line, a detecting element positioned in said second transmission line and connected to the center conductor of said first transmission line, said detecting element having an input impedance substantially higher than said first transmission line impedance whereby said second transmission line has no appreciable effect upon said first transmission line, means associated with said detecting element for maintaining the overall impedance of said detecting element and said last named means at a substantially constant value over a wide frequency range, a video output transmission line connected to the other side of said detecting element and an RF return bypass capacitor connected across the video transmission line to ground.
Claim 3
Dependent Claim
149 words
In coaxial line apparatus of the type used as a termination and detector for high frequency signals, an input coaxial transmission line comprising an inner conductor and an outer conductor, means forming a junction so that said input coaxial transmission line branches into a load transmission line and a parallel transmission line, said load transmission line haviNg inner and outer conductors, a matching resistance having a first terminal connected to said inner conductor and a second terminal coupled to said outer conductor of said load transmission line for terminating the same, said parallel transmission line having an outer conductor and inner conductive means, separate from said load transmission line, said parallel transmission line inner conductive means having portions including lossy material and a high impedance detecting element, said parallel transmission line inner conductive means terminating in an inner conductor output portion coaxial with said parallel transmission line outer conductor.
Claim 4
Dependent Claim
149 words
In coaxial line apparatus of the type used as a termination and detector for high frequency signals, an input coaxial transmission line comprising an inner conductor and an outer conductor, means forming a junction so that said input coaxial transmission line branches into a load transmission line and a parallel transmission line, said load transmission line haviNg inner and outer conductors, a matching resistance having a first terminal connected to said inner conductor and a second terminal coupled to said outer conductor of said load transmission line for terminating the same, said parallel transmission line having an outer conductor and inner conductive means, separate from said load transmission line, said parallel transmission line inner conductive means having portions including lossy material and a high impedance detecting element, said parallel transmission line inner conductive means terminating in an inner conductor output portion coaxial with said parallel transmission line outer conductor.
Claim 5
Dependent Claim
18 words
Coaxial line apparatus in accordance with claim 2 in which said high impedance detector comprises a crystal diode.
Claim 6
Dependent Claim
70 words
Coaxial line apparatus in accordance with claim 3 wherein the portion of said parallel transmission line inner conductive means comprised by said crystal diode forms an angle with respect to the axis of said parallel transmission line outer conductor and wherein said parallel transmission line outer conductor has an apertured portion substantially aligned with said crystal diode whereby said crystal diode can be inserted or removed through said apertured portion.
Claim 7
Dependent Claim
34 words
Coaxial line apparatus in accordance with claim 4 in which the angle formed by said crystal diode with respect to the axis of said parallel transmission line outer conductor is substantially a right angle.
Claim 8
Dependent Claim
101 words
Coaxial line apparatus in accordance with claim 4 in which the portion of said lossy transmission line inner conductive means comprised by lossy material is also disposed at the same angle with respect to the axis of said lossy transmission line outer conductor as said crystal diode, said lossy material extending into said apertured portion of said outer conductive means and surrounding a portion of said crystal diode, means for adjusting the position of said lossy material with respect to said crystal diode to equalize the response of the crystal diode to the high frequency signals over a wide frequency range.
Claim 9
Dependent Claim
63 words
Coaxial line apparatus in accordance with claim 4 wherein said lossy transmission line inner conductive means includes an impedance element connected between said crystal diode and said inner conductor output portion, said impedance element having resistance and capacitance and including a center conductor in series with a lumped resistance and lossy material forming a capacitor bead surrounding said center conductor and lumped resistance.
Claim 10
Dependent Claim
57 words
Coaxial line apparatus in accordance with claim 7 including an additional impedance element comprising a capacitance connected in said lossy transmission line between said lumped resistance and said outer conductor, said additional impedance element cooperating with said impedance element to form an RC filter for filtering out signals on said lossy transmission line below a predetermined frequency.
Claim 11
Dependent Claim
39 words
Coaxial line apparatus in accordance with claim 8 including a chip resistor having a relatively high resistance connected between said impedance element and said inner conductor output portion for attenuating relatively low frequency signals on said lossy transmission line.
Claim 12
Dependent Claim
61 words
Coaxial line apparatus in accordance with claim 2 wherein said matching resistance is a rod resistance forming a continuation of said load transmission line inner conductor and wherein said load transmission line outer conductor has a plurality of discontinuous steps in the vicinity of said matching resistance approximating a tractorial taper to compensate for slow signal propagation through said matching resistance.
Claim 13
Dependent Claim
54 words
Coaxial line apparatus in accordance with claim 3 wherein said means forming a junction includes a center conductor section having one end continuous with said input center conductor and having another end connected to said matching resistance first terminal, said center conductor section having an aperture between its ends mating with said crystal diode.
Claim 14
Dependent Claim
45 words
Coaxial line apparatus in accoRdance with claim 11 wherein said center conductor section has undercut portions for introducing series inductance on either side of the crystal diode connection to the center conductor section in order to compensate for capacitive effects associated with said crystal diode.
Claim 15
Dependent Claim
73 words
Coaxial line apparatus in accordance with claim 12 wherein said center conductor section undercut portions overcompensate for the crystal diode capacitance and including a threaded aperture in said load transmission line outer conductor adjacent the first terminal of said matching resistance and further including a threaded screw member disposed in said threaded aperture and threadably adjustable therein for inserting additional capacitance to bring the effective discontinuity susceptance of said junction means to zero.
Claim 16
Dependent Claim
43 words
Coaxial line apparatus in accordance with claim 2 wherein said input transmission line outer conductor has a coaxial recess, an insulating bead mounted in said coaxial recess, said insulating bead having a central opening through which said input transmission line inner conductor passes.
Claim 17
Dependent Claim
38 words
Coaxial line apparatus in accordance with claim 14 in which said insulating bead has its central opening counterbored to introduce inductance to compensate for the capacitance introduced by said coaxial recess in said input transmission line outer conductor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |