GB1117348A - Microwave harmonic generator - Google Patents
Microwave harmonic generatorInfo
- Publication number
- GB1117348A GB1117348A GB1329366A GB1329366A GB1117348A GB 1117348 A GB1117348 A GB 1117348A GB 1329366 A GB1329366 A GB 1329366A GB 1329366 A GB1329366 A GB 1329366A GB 1117348 A GB1117348 A GB 1117348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waveguide
- harmonic
- diode
- wall
- screw
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
- H03B19/16—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes
- H03B19/18—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes and elements comprising distributed inductance and capacitance
Landscapes
- Waveguide Connection Structure (AREA)
Abstract
1,117,348. Microwave harmonic generation. MULLARD Ltd. 24 April, 1967 [25 March, 1966], No. 13293/66. Heading H2F. [Also in Division H1] A microwave fourth-harmonic generator comprises a coaxial line coupling the input signal to a varactor diode whose other terminal is connected to a waveguide having a cut-off frequency above the third harmonic of the signal but below the fourth harmonic, and a variable capacitance between the first diode terminal and the waveguide wall to form with the diode and part of the waveguide wall a circuit series-resonant at the fourth harmonic. In Fig. 3 the signal enters at the coaxial line V which has its inner conductor broadened at the inner end G to provide a length of lower impedance. A bent connector Q forms with the adjacent waveguide wall a high-impedance line to match the input to the diode K. An adjustable screw S1 forms with the diode a variable capacitance which together with the inductance from the lower terminal of the diode through the waveguide wall to the end of the screw provides a circuit series-resonant at the fourth harmonic (Fig. 2, not shown). The necessary bias for the diode is supplied via the inner conductor of the coaxial cable. A conductive member N extends from the upper terminal of the diode into a dielectric block H on the opposite wall of the waveguide. This member forms with the bottom (broad) wall of the waveguide a transmission line which can be tuned by a screw S2 (see also Fig. 4, not shown) to resonate at the second harmonic. The parts Q, K and N can be formed integrally and plugged into the end of the coaxial line F. The diode is held in position by a nylon screw (J in Fig. 4, not shown) threaded through the upper wall of the waveguide. The waveguide has an adjustable short-circuiting piston P and the energy passes up the main waveguide W1 to an output waveguide W2. The section W1 cuts off any third harmonic but passes the fourth harmonic, and the distance b should be an odd number of quarter wavelengths at the fourth harmonic. Radial chokes may be provided in the flange connecting W1 to W2 and half- or quarter-wave chokes in the piston P. This arrangement is suitable for converting 2.25 Gc/s. to 9 Gc/s. To prevent the line F from propagating fourth-harmonic energy in a waveguide mode the mean radius of the inner and outer conductors should be less than 1/2# times the wavelength and the electrical length of the parts Q and G together should be a quarter wavelength at the fourth harmonic. In a modification (Figs. 5 and 6, not shown) for converting 9 Gc/s. to 36 Gc/s. the diode is mounted eccentrically in a block which can be rotated (Figs. 7 and 8, not shown) to vary the distance of the diode from the waveguide wall and hence the capacitance; this adjustment replaces the screw S1 of Fig. 3. In addition, the lower-impedance section G is formed by reducing the diameter of the outer conductor and the member N is self-supporting without the dielectric block H. At the junction of the waveguide sections W1 and W2 a capacitive iris is provided (Figs. 5 and 12, not shown), the aperture of which has a longer dimension which is greater than the wide dimension of W1 and a short dimension which is less than the narrow dimension of W2. This iris compensates for the inductive discontinuity at the join and resonates at the output frequency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1329366A GB1117348A (en) | 1966-03-25 | 1966-03-25 | Microwave harmonic generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1329366A GB1117348A (en) | 1966-03-25 | 1966-03-25 | Microwave harmonic generator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1117348A true GB1117348A (en) | 1968-06-19 |
Family
ID=10020326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1329366A Expired GB1117348A (en) | 1966-03-25 | 1966-03-25 | Microwave harmonic generator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1117348A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109283448A (en) * | 2018-10-08 | 2019-01-29 | 北方电子研究院安徽有限公司 | A kind of avalanche diode high-frequency tuning device |
-
1966
- 1966-03-25 GB GB1329366A patent/GB1117348A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109283448A (en) * | 2018-10-08 | 2019-01-29 | 北方电子研究院安徽有限公司 | A kind of avalanche diode high-frequency tuning device |
CN109283448B (en) * | 2018-10-08 | 2021-01-05 | 北方电子研究院安徽有限公司 | Avalanche diode high-frequency tuning device |
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