US5507011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency switch including strip line and two switching diodes
Assignee: Murata Manufacturing Co Ltd
•
Filing: 1993-12-21
•
Granted: 1996-04-09
•
Expires: 2013-12-21
Abstract
Abstract A transmitting circuit is connected to an antenna via a first diode. The antenna is connected to a receiving circuit with the circuit including a strip line and a second diode. Two diodes are turned ON by applying a positive voltage to a first control terminal. In this state, a signal from the transmitting circuit is transmitted from the antenna. The transmission signal is not transferred to the receiving circuit side due to a series resonance circuit with the inductance of the second diode and a capacitor. When the high-frequency switch is used for reception, a positive voltage is applied to a second control terminal. The voltage is divided by a resistors respectively connected to the diodes in parallel, and applied to the diodes as a backward voltage. And hence, the diodes are surely maintained in the OFF state. The isolation between the transmitting circuit and the antenna is improved by a parallel resonance circuit with the capacitance of the first diode and a inductor.
Inventors
- 👤 Yoshikazu Chigodo
- 👤 Harufumi Mandai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:08
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/15; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/48
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
203 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising; a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and said receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a first control terminal connected to the anode of said first diode for inputting a signal to turn ON said first diode and said second diode; a second control terminal connected to the cathode of said second diode for inputting a signal to turn OFF said first diode and said second diode; an inductor connected to said first diode in parallel; a capacitor connected in series between said cathode of said second diode and ground; and at least one resistor respectively connected in parallel with each of said first diode and said second diode, for applying a signal inputted from said second control terminal to said first diode and said second diode.
Claim 2
Dependent Claim
203 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising; a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and said receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a first control terminal connected to the anode of said first diode for inputting a signal to turn ON said first diode and said second diode; a second control terminal connected to the cathode of said second diode for inputting a signal to turn OFF said first diode and said second diode; an inductor connected to said first diode in parallel; a capacitor connected in series between said cathode of said second diode and ground; and at least one resistor respectively connected in parallel with each of said first diode and said second diode, for applying a signal inputted from said second control terminal to said first diode and said second diode.
Claim 3
Dependent Claim
19 words
A high-frequency switch in accordance with claim 1, which further comprises a capacitor connected to said inductor in series.
Claim 4
Dependent Claim
21 words
A high-frequency switch in accordance with claim 2, which further comprises a separate capacitor connected to said first diode in parallel.
Claim 5
Dependent Claim
27 words
A high-frequency switch in accordance with claim 1, wherein said first control terminal is connected to the anode of said first diode via a separate strip line.
Claim 6
Dependent Claim
27 words
A high-frequency switch in accordance with claim 2, wherein said first control terminal is connected to the anode of said first diode via a separate strip line.
Claim 7
Dependent Claim
27 words
A high-frequency switch in accordance with claim 3, wherein said first control terminal is connected to the anode of said first diode via a separate strip line.
Claim 8
Dependent Claim
27 words
A high-frequency switch in accordance with claim 1, further comprising a resistor connected in series between said cathode of said second diode and said second control terminal.
Claim 9
Dependent Claim
27 words
A high-frequency switch in accordance with claim 7, further comprising a resistor connected in series between said anode of said first diode and said first control terminal.
Claim 10
Dependent Claim
142 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising: a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and a receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a control terminal connected to the anode of said first diode for inputting a signal to control said first diode and said second diode; a series circuit of an inductor and a capacitor connected in parallel with said first diode; and a separate capacitor connected in parallel with said first diode.
Claim 11
Dependent Claim
142 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising: a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and a receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a control terminal connected to the anode of said first diode for inputting a signal to control said first diode and said second diode; a series circuit of an inductor and a capacitor connected in parallel with said first diode; and a separate capacitor connected in parallel with said first diode.
Claim 12
Dependent Claim
191 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising: a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and a receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a first control terminal connected to the anode of said first diode for inputting a signal to turn ON said first diode and said second diode; a second control terminal connected to the cathode of said second diode for inputting a signal to turn OFF said first diode and said second diode; a resistor connected in parallel with said first diode for applying a signal inputted from said second control terminal across said first diode; and a separate resistor connected in parallel with said second diode for applying a signal inputted from said second control terminal across said second diode.
Claim 13
Dependent Claim
191 words
A high-frequency switch for being connected to a transmitting circuit, a receiving circuit and an antenna for switching a connection between said transmitting circuit and said antenna, and a connection between said receiving circuit and said antenna, comprising: a first diode whose anode is connected to a transmitting circuit terminal and whose cathode is connected to an antenna terminal; a strip line connected between said antenna terminal and a receiving circuit terminal; a second diode whose anode is connected to said receiving circuit terminal and whose cathode is connected to ground; a first control terminal connected to the anode of said first diode for inputting a signal to turn ON said first diode and said second diode; a second control terminal connected to the cathode of said second diode for inputting a signal to turn OFF said first diode and said second diode; a resistor connected in parallel with said first diode for applying a signal inputted from said second control terminal across said first diode; and a separate resistor connected in parallel with said second diode for applying a signal inputted from said second control terminal across said second diode.
Claim 14
Dependent Claim
19 words
A high-frequency switch in accordance with claim 10, further comprising an inductor connected in parallel with said first diode.
Claim 15
Dependent Claim
18 words
A high-frequency switch in accordance with claim 11, further comprising a capacitor connected in series with said inductor.
Claim 16
Dependent Claim
20 words
A high-frequency switch in accordance with claim 12, further comprising a separate capacitor connected in parallel with said first diode.
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) | 1999-04-09 | 1999-10-09 | 2000-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-09 | 2003-10-09 | 2004-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-09 | 2007-10-09 | 2008-04-09 | $7700.00 | Window Closed / Lapsed |