Patent US5220679A successfully refreshed from Google Patents.
US5220679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission-reception diplexer having a diode rf switch
Assignee: Siemens AG
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Filing: 1991-04-18
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Granted: 1993-06-15
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Expires: 2011-04-18
Abstract
Abstract In a transmitting-receiving diplexer having a transmitting channel for forwarding a radio-frequency transmission signal to an antenna connectible to an antenna terminal and having a receiving channel for forwarding a signal received from the antenna to a receiver, at least one diode is provided in the receiving channel as an RF switch. A rectifier is connected to the transmitting channel and to the diode or diodes of the RF switch, the rectifier generating a blocking voltage required for blocking the receiving channel during transmission of the transmission signal. Further, a control switch is provided that disconnects the blocking voltage from the diode or diodes of the RF switch during reception.
Inventors
- 👤 Klaus Zametzer
- 👤 Markus Vester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:33
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A radio-frequency transmitting-receiving diplexer, comprising: a radio-frequency switch between an antenna terminal and a receiver terminal, said radio-frequency switch including first and second PIN diodes connected in series with one another via a junction and poled in opposition to one another; a rectifier including means for supplying a blocking voltage to said first and second PIN diodes; a control switch controllably connecting said blocking voltage to said first and second PIN diodes; a pair of coupling capacitors respectively couple said radio-frequency switch to said antenna terminal and to said receiver terminal; a first filter element including a series circuit of an inductor and a capacitor connected in parallel to said first PIN diode of said radio-frequency switch; a second filter element including a series circuit of an inductor and a capacitor connected in parallel to said second PIN diode of said radio-frequency switch; said inductors of said first and second filter elements connected together and to said junction of said first and second PIN diodes; and said inductor of said second filter element connected to said rectifier via said control switch.
Claim 2
Dependent Claim
181 words
A radio-frequency transmitting-receiving diplexer, comprising: a radio-frequency switch between an antenna terminal and a receiver terminal, said radio-frequency switch including first and second PIN diodes connected in series with one another via a junction and poled in opposition to one another; a rectifier including means for supplying a blocking voltage to said first and second PIN diodes; a control switch controllably connecting said blocking voltage to said first and second PIN diodes; a pair of coupling capacitors respectively couple said radio-frequency switch to said antenna terminal and to said receiver terminal; a first filter element including a series circuit of an inductor and a capacitor connected in parallel to said first PIN diode of said radio-frequency switch; a second filter element including a series circuit of an inductor and a capacitor connected in parallel to said second PIN diode of said radio-frequency switch; said inductors of said first and second filter elements connected together and to said junction of said first and second PIN diodes; and said inductor of said second filter element connected to said rectifier via said control switch.
Claim 3
Dependent Claim
37 words
The radio-frequency transmitting-receiving diplexer of claim 1, wherein: said first and second PIN diodes are each connected to one another at their cathodes; and said rectifier comprises means for supplying a positive blocking voltage to said cathodes.
Claim 4
Dependent Claim
41 words
The radio-frequency transmitting-receiving diplexer of claim 1, wherein: said radio-frequency switch includes means for supplying a control current to said first and second PIN diodes upon receipt of a transmitted signal to cause conduction of said first and second PIN diodes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |