EP0054645B1 - Commutateur à diode PIN - Google Patents
Commutateur à diode PIN Download PDFInfo
- Publication number
- EP0054645B1 EP0054645B1 EP81108177A EP81108177A EP0054645B1 EP 0054645 B1 EP0054645 B1 EP 0054645B1 EP 81108177 A EP81108177 A EP 81108177A EP 81108177 A EP81108177 A EP 81108177A EP 0054645 B1 EP0054645 B1 EP 0054645B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pin
- diode
- lines
- compensation
- diode switch
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
- H01P1/15—Auxiliary devices for switching or interrupting by semiconductor devices
Definitions
- the invention relates to a PIN diode switch with high blocking attenuation, which, between an input for the signal to be switched and an output, has an arrangement of two four-terminal poles connected in series, which phase-shift the signal to be switched by 90 ° at the operating frequency. in which a PIN diode is switched on as a cross-branch between the connection of the two four-pin connections and a common ground line.
- PIN diodes are often used for switching tasks.
- PIN diodes have an effective resistance for HF, the size of which depends on the strength of an impressed control direct current. If no direct current flows through the PIN diode, then it only has a small, very low-loss capacity without parametric effects.
- the capacitance is independent of the RF voltage applied.
- PIN diodes are generally parallel to the consumer. Since the forward resistance of the switched PIN diode is in the order of magnitude between 0.5 and 1 ohm, the required values for the blocking attenuation are usually not achieved in practice with a single diode, but networks of PIN diodes are required. As a basic circuit, networks with three PIN diodes, which are connected as a ⁇ element or T element (electronics practice, No. 12, December 1972, pages 14 to 22), are known.
- a high attenuation PIN diode switch is known from JP-A-5212963.
- the PIN diode switch essentially consists of two ⁇ / 4 lines connected in series and a PIN diode which is connected to ground from the connection point of the X / 4 lines.
- Diode chains are also used for microwave switches, in which several PIN diodes are coupled to one another via so-called inverting elements (four-pole) - in the microwave range these are preferably X / 4 lines.
- the «inverting elements rotate the phase of the voltage by 90 ° at the operating frequency.
- all diodes are grounded on one side and always have the same switching status with each other (see above electronics practice, US-A-3 859 609).
- the object of the invention is to provide a PIN diode switch which, with little circuit complexity, has a high blocking attenuation and a low pass loss.
- the object is achieved in that between the input and the output a compensation network for compensating for the residual voltage coming from the input to the output in the case of a conductive PIN diode is switched on.
- the circuit is particularly simple if the two four-pole are ⁇ / 4 lines.
- the invention is based on the knowledge that a higher blocking attenuation is possible through compensation.
- the circuit arrangement is particularly simple and space-saving.
- the PIN diode is switched between two X / 4 lines.
- a compensation network is connected in parallel with the A / 4 lines. With this arrangement, much higher attenuation than 25 dB is achieved.
- RF losses are generally lower than diode networks.
- the area requirement decreases and a compensation of undesirable diode reactances is largely possible.
- the) £ / 4 lines and the compensation network have a common ground line. These measures make the diode switch and the compensation network particularly simple.
- a PIN diode connected in parallel to the consumer and one-sided to ground is the most effective solution above approx. 1 GHz.
- the compensation network is also particularly simple.
- the compensation network consists of a parallel connection of a Compensation resistor and a compensation capacitor in the series branch.
- This simple parallel connection of a resistor with a capacitance means that the PIN diode can be compensated over a wide range.
- the PIN diode switch is implemented using layer technology and the X / 4 lines are implemented as printed conductor tracks.
- This circuit is characterized by a particularly small footprint. The entire back of the printed circuit serves as a ground.
- the compensation capacity is formed by a special configuration of the supply lines of the X / 4 lines.
- the compensation capacity is generated by a special line routing.
- Fig. 1 shows the basic circuit diagram of a PIN diode switch.
- a generator G with the internal resistance Z is connected to a line L via a decoupling capacitor C E1 .
- the generator G here symbolizes the source of a signal to be switched.
- the terminating resistor Z v is connected to the other end of the line L via a second decoupling capacitor CE2.
- the PIN diode D is connected between the line L and ground in parallel to the consumer Z v or in parallel to the generator G.
- the equivalent circuit diagram of the PIN diode consists of a parallel capacitance CP ⁇ 0.3 pF, which is parallel to the connection terminals of the PIN diodes.
- FIG. 2 An arrangement according to the invention is shown in FIG. 2.
- the generator G with the internal resistance Z is connected via the first decoupling capacitor C E1 to the input E of a ⁇ / 4-long line L1 with the practically real characteristic impedance Z L.
- the line L1 was shown as a four-pole, the second input of which is connected to the second connection of the generator G.
- the PIN diode D is connected as a cross member, which is followed by a second ⁇ / 4 line L2, at the output A of which a consumer Z v is connected via a second decoupling capacitor C E2 is switched on.
- a further four-pole K is connected, which contains the compensation circuit -a compensation resistor R K connected between input E and output A of the arrangement, to which a compensation capacitance C K can be connected in parallel.
- the lines L1 and L2 have the characteristic impedance Z L , which is generally the same or similar to the generator resistance Z l and the consumer resistance Zv.
- the PIN diode D connected in parallel to the consumer does not represent an ideal short circuit due to its remaining forward resistance R D of approx. 1 ohm and the longitudinal inductance L D determined by its mechanical dimensions, a residual voltage remains at the coupling point of the diode. Seen from the consumer, this residual voltage causes the PIN diode to appear as a source that generates a wave propagating towards the consumer. However, the decoupling is limited.
- the longitudinal inductance L D of the PIN diode is to be taken into account, it can be largely compensated for by the compensation capacitor C K.
- FIG. 3 shows the structure of the PIN diode switch according to the invention in layered technology.
- the PIN diode D is here in the design. «Chip on rivet inserted.
- L1 and L2 represent the ⁇ / 4 lines.
- the compensation resistor R K and the compensation capacitor C K serve to compensate the diode reactances.
- the compensation capacitor C K can be simulated by a special line routing, in which the lines L 1 and L 2 are formed symmetrically and approach one another during the transition into the supply lines Z1 and Z2.
- the input of the circuit was designated E and the output A according to FIG. 2.
- the copper cladding on the back of the layer circuit serves as the ground. With such an arrangement, blocking attenuation greater than 60 dB can be achieved.
- FIG. 4 A variant for increasing the bandwidth is shown in FIG. 4.
- the compensation resistor R K was replaced by two compensation resistors R K1 and R K2 .
- the compensation resistors R K1 and R K2 are arranged at a distance ⁇ L 1 smaller than ⁇ / 4.
- the distance ⁇ L 2 of the second compensation resistor R K2 to the diode D is also less than ⁇ / 4.
- the curve of the blocking attenuation as a function of the frequency f is shown in curve 3 of FIG. 5.
- the damping curve of the circuit arrangement according to FIG. 2 was drawn in as curve 1.
Landscapes
- Electronic Switches (AREA)
- Electrophonic Musical Instruments (AREA)
- Attenuators (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Filters And Equalizers (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81108177T ATE16059T1 (de) | 1980-12-18 | 1981-10-09 | Pin-dioden-schalter. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3047869 | 1980-12-18 | ||
DE3047869A DE3047869C1 (de) | 1980-12-18 | 1980-12-18 | PIN-Diodenschalter |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0054645A2 EP0054645A2 (fr) | 1982-06-30 |
EP0054645A3 EP0054645A3 (en) | 1982-12-01 |
EP0054645B1 true EP0054645B1 (fr) | 1985-10-09 |
Family
ID=6119579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81108177A Expired EP0054645B1 (fr) | 1980-12-18 | 1981-10-09 | Commutateur à diode PIN |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0054645B1 (fr) |
AT (1) | ATE16059T1 (fr) |
AU (1) | AU529008B2 (fr) |
DE (1) | DE3047869C1 (fr) |
YU (1) | YU296281A (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3534980A1 (de) * | 1985-10-01 | 1987-04-02 | Licentia Gmbh | Hohlleiterschalter |
DE102012208529B4 (de) | 2012-05-22 | 2018-10-18 | Rohde & Schwarz Gmbh & Co. Kg | Elektronischer Schalter mit Kompensation nichtlinearer Verzerrungen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53136952A (en) * | 1977-05-06 | 1978-11-29 | Fujitsu Ltd | High-frequency switch |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3775708A (en) * | 1973-01-12 | 1973-11-27 | Anaren Microwave Inc | Microwave signal attenuator |
US3859609A (en) * | 1973-07-23 | 1975-01-07 | Texas Instruments Inc | Absorptive pin attenuators |
JPS52129263A (en) * | 1976-04-22 | 1977-10-29 | Nec Corp | Variable attenuator |
JPS6056330B2 (ja) * | 1977-05-06 | 1985-12-10 | 日本電気株式会社 | 調整機構付きad変換回路 |
JPS55109019A (en) * | 1979-02-15 | 1980-08-21 | Victor Co Of Japan Ltd | Pin diode switch circuit |
-
1980
- 1980-12-18 DE DE3047869A patent/DE3047869C1/de not_active Expired
-
1981
- 1981-10-09 EP EP81108177A patent/EP0054645B1/fr not_active Expired
- 1981-10-09 AT AT81108177T patent/ATE16059T1/de not_active IP Right Cessation
- 1981-12-16 YU YU02962/81A patent/YU296281A/xx unknown
- 1981-12-17 AU AU78595/81A patent/AU529008B2/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53136952A (en) * | 1977-05-06 | 1978-11-29 | Fujitsu Ltd | High-frequency switch |
Also Published As
Publication number | Publication date |
---|---|
ATE16059T1 (de) | 1985-10-15 |
EP0054645A2 (fr) | 1982-06-30 |
AU529008B2 (en) | 1983-05-19 |
DE3047869C1 (de) | 1982-05-27 |
YU296281A (en) | 1984-06-30 |
AU7859581A (en) | 1982-06-24 |
EP0054645A3 (en) | 1982-12-01 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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