US3600707A - Compensated flat directional coupler - Google Patents
Compensated flat directional couplerInfo
- Publication number
- US3600707A US3600707A US831590A US83159069A US3600707A US 3600707 A US3600707 A US 3600707A US 831590 A US831590 A US 831590A US 83159069 A US83159069 A US 83159069A US 3600707 A US3600707 A US 3600707A
- Authority
- US
- United States
- Prior art keywords
- coupler
- coupled
- branch
- flat directional
- directional coupler
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
Abstract
A compensated flat directional coupler includes a main branch carrying an electrical signal and a coupled branch carrying a coupled electrical signal responsive to the signal on the main branch. The coupled branch includes an auxiliary compensating network in the output portion of the coupled branch. The auxiliary compensating network couples to the coupled branch and is substantially isolated from the main branch. The auxiliary compensating network is substantially independent of the coupling between the main and coupled branch. The auxiliary coupling network renders the ratio of coupled output signal to the main branch output signal substantially independent of input signal frequency variation.
Claims (9)
1. A coupled line compensating network for use with a TEM mode first transmission line coupler operative over a frequency range embracing a predetermined center frequency, said first coupler including means defining input, main output and coupler output ports and means defining main and coupled branches, said main branch being arranged for carrying an electrical signal, said coupled branch being arranged for carrying a coupled signal in response to the signal carried by said main branch, said coupled line compensating network including means defining a series conductor having two ends for connection by one of said ends to said coupler output port for carrying said coupled signal to said other end, means defining at least one auxiliary branch coacting with said series branch for establishing a coupling coefficient therebetween k2 and substantially isolated from said main branch for rendering the ratio of said coupled signal to said signal on said main branch substantially insensitive to frequency variation, said coefficient k2 being defined by the following equation: k22 (1/1+sin theta e) wherein theta e defines the band edge of said frequency range.
2. A compensating network according to claim 1 and further comprising, said first coupler, and means connecting said first coupler to said series branch to provide a compensatEd flat directional coupler, said first coupler comprising coupled lines characterized by a coupling coefficient k1 defined by: wherein K is the midband coupling of a compensated flat directional coupler comprising said first coupler and said compensating network
3. A compensated flat directional coupler according to claim 2 including at least two of said auxiliary branches coacting with said series branch each for a length corresponding substantially to an odd multiple of quarter wavelengths at said center frequency of said first coupler.
4. A compensated flat directional coupler according to claim 3 comprising two of said auxiliary branches coacting with said series branch and coupled thereto each for a length corresponding substantially to one quarter wavelength at said center frequency.
5. A compensated flat directional coupler according to claim 4 wherein said first coupler comprises a single section coupled transmission line coupler.
6. A compensated flat directional coupler according to claim 2 wherein said first coupler includes means defining a multiple section transmission line coupler and at least two of said auxiliary branches coact with said series branch to define multiple section transmission line couplers.
8. A compensated flat directional coupler according to claim 3 wherein said first coupler comprises a single section coupled transmission line coupler and said auxiliary branches coact with said series branch to define multiple section transmission line couplers.
8. A compensated flat directional according to claim 3 wherein the coupling coefficient achieved by each of said auxiliary branches coacting with said series branch are substantially equal to one another.
9. A compensated flat directional coupler according to claim 3 comprising an even number of said auxiliary branches coacting with said series branch each for a length corresponding substantially to an odd multiple of quarter wavelengths at said center frequency of said first coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US831590A US3600707A (en) | 1969-06-09 | 1969-06-09 | Compensated flat directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US831590A US3600707A (en) | 1969-06-09 | 1969-06-09 | Compensated flat directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3600707A true US3600707A (en) | 1971-08-17 |
Family
ID=25259414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US831590A Expired - Lifetime US3600707A (en) | 1969-06-09 | 1969-06-09 | Compensated flat directional coupler |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3600707A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935480A (en) * | 1974-06-28 | 1976-01-27 | International Business Machines Corporation | Broad band directional signal generator |
| US4013981A (en) * | 1974-06-29 | 1977-03-22 | Kokusai Denshin Denwa Kabushiki Kaisha | Constant-resistance coupled-line type equalizer |
| US5570069A (en) * | 1994-05-02 | 1996-10-29 | E-Systems, Inc. | Broadband directional coupler |
| US5625328A (en) * | 1995-09-15 | 1997-04-29 | E-Systems, Inc. | Stripline directional coupler tolerant of substrate variations |
| US20060164181A1 (en) * | 2005-01-24 | 2006-07-27 | Lu Chen | Coupling flatness compensated directional coupler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3048798A (en) * | 1959-12-24 | 1962-08-07 | Jerrold Electronics Corp | Directional coupler |
| US3297967A (en) * | 1964-10-02 | 1967-01-10 | Alfred Electronics | Multielement directional coupler |
-
1969
- 1969-06-09 US US831590A patent/US3600707A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3048798A (en) * | 1959-12-24 | 1962-08-07 | Jerrold Electronics Corp | Directional coupler |
| US3297967A (en) * | 1964-10-02 | 1967-01-10 | Alfred Electronics | Multielement directional coupler |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935480A (en) * | 1974-06-28 | 1976-01-27 | International Business Machines Corporation | Broad band directional signal generator |
| US4013981A (en) * | 1974-06-29 | 1977-03-22 | Kokusai Denshin Denwa Kabushiki Kaisha | Constant-resistance coupled-line type equalizer |
| US5570069A (en) * | 1994-05-02 | 1996-10-29 | E-Systems, Inc. | Broadband directional coupler |
| US5625328A (en) * | 1995-09-15 | 1997-04-29 | E-Systems, Inc. | Stripline directional coupler tolerant of substrate variations |
| US20060164181A1 (en) * | 2005-01-24 | 2006-07-27 | Lu Chen | Coupling flatness compensated directional coupler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4047128A (en) | System filter for double frequency utilization | |
| US4305043A (en) | Coupler having arbitrary impedance transformation ratio and arbitrary coubling ratio | |
| US3659227A (en) | Switch-controlled directional coupler | |
| GB1582285A (en) | Directional coupler | |
| GB1524861A (en) | Coupler for the separation of two signals each of which comprises two orthogonally polarized frequency bands | |
| GB1388318A (en) | Networks | |
| CN206947490U (en) | A kind of directional coupler of not decile power | |
| GB1392645A (en) | Balanced mixer | |
| US3600707A (en) | Compensated flat directional coupler | |
| CN107196033A (en) | A kind of directional coupler of not decile power | |
| EP0066015B1 (en) | Coupler having arbitary impedance transformation ratio and arbitary coupling ratio | |
| US3221274A (en) | Unbalanced line directional couplers and television frequency translating systems utilizing said couplers | |
| US3219949A (en) | Multiport hybrid coupling device for wave transmission systems | |
| US4093928A (en) | Microstrip hybrid ring coupler | |
| US3634768A (en) | Wide bandwidth microwave mixer circuits | |
| JPS5451446A (en) | Directional coupler | |
| JP2861228B2 (en) | Directional coupler | |
| JPS5669901A (en) | Microwave coplanar-line/slot-line converting transmission line | |
| GB1171985A (en) | Wide-Band Coupling Apparatus | |
| GB1168811A (en) | Improvements in and relating to Broad Band Coupling Arrangements for High Frequency Signals | |
| GB980075A (en) | Improvements in or relating to high frequency filters | |
| GB654498A (en) | Improvements in and relating to aerial systems | |
| GB1207019A (en) | Improvements in or relating to electromagnetic wave filters | |
| JPS63227202A (en) | Hybrid circuit | |
| US3447102A (en) | Microwave frequency converters comprising multi-port directional couplers |