EP0120042A1 - Microwave variable attenuator - Google Patents
Microwave variable attenuatorInfo
- Publication number
- EP0120042A1 EP0120042A1 EP83902973A EP83902973A EP0120042A1 EP 0120042 A1 EP0120042 A1 EP 0120042A1 EP 83902973 A EP83902973 A EP 83902973A EP 83902973 A EP83902973 A EP 83902973A EP 0120042 A1 EP0120042 A1 EP 0120042A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microwave
- substrate
- attenuator
- chip
- variable attenuator
- 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.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract 5
- 239000004020 conductor Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001902 propagating effect Effects 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011358 absorbing material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/22—Attenuating devices
- H01P1/227—Strip line attenuators
Definitions
- This invention relates to the field of microwave frequency attenuators and, more particularly, to variable attenuators.
- microwave attenuators are invariably necessary for proper operation of the systems.
- variable attenuators are used.
- Microwave power variable attenuators are known in the prior art. In the past such attenuators could only be realized in two forms: coaxial and waveguide. Attenuators having these forms are physically large and heavy, which is a severe disadvantage in size and weight limited environments such as satellites and spacecraft. Coaxial attenuators were made by inserting a microwave absorbing material between the inner and outer conductors at some point in the coaxial line. The attenuator was necessarily fixed and invariable. Since a discrete section of the coaxial line had to be connected into the microwave circuit along with the attendant connectors, the attenuator was bulky and somewhat heavy.
- Attenuation was achieved by inserting a resistance card partially into the interior of the waveguide through a slot in a wall of the waveguide . The amount of attenuation was varied by moving the re si stance card in or out . This type of attenuator also was bulky and heavy.
- a variable attenuator that substantially solves the above-de scribed problems of the prior art comprises an electrically conductive substrate , an electrically conductive transmission line disposed near the substrate and a movable attenuator disposed between the transmission line and the substrate can be changed by moving the attenuator .
- FIGURE is a plan view of a microwave variable attenuator in accordance with the preferred embodiment of the present invention .
- FIGURE shows a variable attenuator 10 having an electrically conductive frame 15 , a coaxial microwave power input port 20 , and a coaxial microwave power output port 25.
- Each of the input port 20 and the output port 25 has an outer conductor (not shown ) which is bolted to frame 10 , and an inner conductor (also not shown ) which extends through frame 10 while being electrically isolated from it .
- An electrically conductive substrate 30 is bolted to the interior of frame 10, thereby bringing it into electrical contact with outer ports 20 and 25.
- An insulating guide 35 is disposed on the top surface of substrate 30.
- Guide 35 has a circular hole in its center that is filled with a segmented chip 40.
- the segmented chip 40 has an attenuator segment 45 that comprises a microwave absorbing material, such as Emerson Cumming MF 116 or 117 with a dielectric constant of 9 to 10.
- Segmented chip 40 also has an alumina segment 50 that comprises alumina (AIO3, 99.6%).
- Alumina segment 50 of segmented chip 40 makes up approximately 220° of the circular arc of the chip, and attenuator segment 45 makes up approximately the other 140°.
- the inner conductors of coaxial input port 20 and coaxial output 25 extend through wall of frame 15 while being electrically isolated from it .
- the two inner conductors are connected with one another by a microstrip line 55 that extends across segmented chip 40.
- Segmented chip 40 is closely sandwiched between microstrip line 55 and substrate 30 , but can be freely rotated in the hole of guide 35.
- impedance-matching dots 60 are disposed on guide 35 at e ither side of microstrip line 55 for obtaining a good impedance match between the portion of the microstrip line 55 extending across segmented chip 40 and the portion of microstrip line 55 on either side of segmented chip 40.
- the use of impedance-matching dots is well known .
- Variable attenuator 10 can be placed in a microwave power transmi ssion line and can attenuate the power transmitted therethrough , depending on the setting of segmented chip 40. If no portion of attenuator segment 45 of segmented chip 40 lies between microstrip line 55 and substrate 30 , then power will flow unattenuated through variable attenuator 10. But , as segmented chip 40 i s rotated to bring more of attenuator segment 45 between microstrip line 55 and substrate 30 , variable attenuator 10 attenuates more of the power flowing into it . Segmented chip 40 may be mechanically rotated by conventional techniques .
Abstract
Un atténuateur variable de micro-ondes (10) comprend un substrat conducteur (30), une ligne micro-bande (55), et un organe atténuateur mobile (40) pris en sandwich entre la ligne micro-bande (55) et le substrat (30). L'organe atténuateur est conçu de manière à pouvoir modifier l'étendue de sa surface comprise entre la ligne micro-bande (55) et le substrat (30) en déplaçant l'organe atténuateur (40). Dans un mode préférentiel de réalisation un segment (45) d'un disque sert de matériau atténuateur et le disque est tourné selon l'orientation désirée dans un guide en alumine (35). Le matériau atténuateur et le guide en alumine (35) présentent la même constante diélectrique.A variable microwave attenuator (10) includes a conductive substrate (30), a microstrip line (55), and a movable attenuator member (40) sandwiched between the microstrip line (55) and the substrate (30). The attenuator member is designed so as to be able to modify the extent of its surface between the microstrip line (55) and the substrate (30) by moving the attenuator member (40). In a preferred embodiment a segment (45) of a disk serves as attenuator material and the disk is rotated according to the desired orientation in an alumina guide (35). The attenuator material and the alumina guide (35) have the same dielectric constant.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42646582A | 1982-09-29 | 1982-09-29 | |
US426465 | 1982-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0120042A1 true EP0120042A1 (en) | 1984-10-03 |
Family
ID=23690913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83902973A Pending EP0120042A1 (en) | 1982-09-29 | 1983-08-30 | Microwave variable attenuator |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0120042A1 (en) |
JP (1) | JPS59501650A (en) |
AU (1) | AU561753B2 (en) |
CA (1) | CA1204180A (en) |
IT (1) | IT1168216B (en) |
WO (1) | WO1984001473A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341202A (en) * | 1998-09-02 | 2000-03-08 | Shyang Feng Electric & Machine | Electrically operated lock with manual override |
US6606949B1 (en) | 1999-09-16 | 2003-08-19 | Komori Corporation | Sheet-fed rotary printing press |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4695811A (en) * | 1986-07-28 | 1987-09-22 | Tektronix, Inc. | High frequency coaxial switch |
US4777456A (en) * | 1987-08-10 | 1988-10-11 | Hughes Aircraft Company | Microwave attenuator |
KR20000075389A (en) * | 1999-05-19 | 2000-12-15 | 김덕용 | Apparatus for shifting phase of inputted signal and attenuating the signal |
US6504450B2 (en) * | 2000-08-12 | 2003-01-07 | Kmw Inc. | Signal process apparatus for phase-shifting N number of signals inputted thereto |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL113768C (en) * | 1955-01-27 | |||
US2961621A (en) * | 1958-11-21 | 1960-11-22 | Sperry Rand Corp | Microwave attenuator |
US3215958A (en) * | 1961-07-20 | 1965-11-02 | Harold B Isaacson | Adjustable microwave attenuator having broad-band frequency compensation |
US3119081A (en) * | 1961-09-25 | 1964-01-21 | Lab For Electronics Inc | Microwave attenuator |
US3659233A (en) * | 1970-07-07 | 1972-04-25 | Collins Radio Co | Microstrip rf variable attenuator |
-
1983
- 1983-08-30 EP EP83902973A patent/EP0120042A1/en active Pending
- 1983-08-30 AU AU20315/83A patent/AU561753B2/en not_active Ceased
- 1983-08-30 WO PCT/US1983/001341 patent/WO1984001473A1/en not_active Application Discontinuation
- 1983-08-30 JP JP58503033A patent/JPS59501650A/en active Pending
- 1983-09-28 IT IT49050/83A patent/IT1168216B/en active
- 1983-09-28 CA CA000437858A patent/CA1204180A/en not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO8401473A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341202A (en) * | 1998-09-02 | 2000-03-08 | Shyang Feng Electric & Machine | Electrically operated lock with manual override |
GB2341202B (en) * | 1998-09-02 | 2000-07-19 | Shyang Feng Electric & Machine | Electronic lock |
US6606949B1 (en) | 1999-09-16 | 2003-08-19 | Komori Corporation | Sheet-fed rotary printing press |
Also Published As
Publication number | Publication date |
---|---|
WO1984001473A1 (en) | 1984-04-12 |
IT8349050A0 (en) | 1983-09-28 |
AU2031583A (en) | 1984-04-24 |
AU561753B2 (en) | 1987-05-14 |
JPS59501650A (en) | 1984-09-13 |
CA1204180A (en) | 1986-05-06 |
IT1168216B (en) | 1987-05-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4370659A (en) | Antenna | |
US4375622A (en) | Multiport radio frequency signal combiner | |
US4453142A (en) | Microstrip to waveguide transition | |
US3732508A (en) | Strip line to waveguide transition | |
US3085212A (en) | Tunable circulator | |
US4349790A (en) | Coax to rectangular waveguide coupler | |
US2961621A (en) | Microwave attenuator | |
US4749966A (en) | Millimeter wave microstrip circulator | |
AU561753B2 (en) | Microwave variable attenuator | |
US3505619A (en) | Microwave stripline variable attenuator having compressible,lossy dielectric material | |
US2820206A (en) | Microwave filters | |
JPS60218901A (en) | Method of tuning angular prism filter and transmitter combiner | |
US4777456A (en) | Microwave attenuator | |
US2773242A (en) | Microwave switching arrangements | |
US4167714A (en) | Constant impedance transmission line routing network | |
US4897623A (en) | Non-contacting printed circuit waveguide elements | |
US2749519A (en) | Directional couplers for microwave transmission systems | |
US3546637A (en) | Tunable microstrip band pass filter utilizing gyromagnetic material at the junction of two conductive loops | |
US3480884A (en) | Electromagnetic wave energy coupling apparatus comprising an anisotropic dielectric slab | |
US5173666A (en) | Microstrip-to-inverted-microstrip transition | |
US4970477A (en) | Microwave adjustment device for a transition between a hollow waveguide and a plane transmission line | |
US2689942A (en) | Impedance-matched t junction | |
US4675621A (en) | Temperature compensated circulator | |
JPS625702A (en) | Band-pass filter | |
US3384842A (en) | Right angle coaxial to strip line transition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19840510 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HUGHES AIRCRAFT COMPANY |
|
17Q | First examination report despatched |
Effective date: 19860805 |
|
D17Q | First examination report despatched (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SHISHIDO, TSUNEO Inventor name: SHOLLEY, MICHAEL, D. Inventor name: CRAMM, HERMAN, W., JR. |