Radio communications transceiver with integrated filter, antenna switch, directional coupler and active components

• US 5,903,820 A
• Filed: 04/03/1996
• Issued: 05/11/1999
• Est. Priority Date: 04/07/1995
• Status: Expired due to Fees

• Current Assignee: Filtronic LK Oy
• Original Assignee: Pulse Finland Oy (Yageo Corporation)
• Inventors: Hagstrom, Panu
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): ARTHUR JEANGLAUDE, GERTRUDE
• Application Number:
  US08/627,191
• Time in Patent Office: 1,133 Days
• Field of Search: 455/78, 455/82, 455/84, 455/85, 455/86, 455/87, 455/89, 455/550, 455/575, 455/307, 333/118, 333/124, 333/17.3
• US Class Current: 455/82
• CPC Class Codes: H04B 1/40 Circuits

Abstract

The object of the invention is a radio communication transceiver, in which the low noise pre-amplifier and mixer of the receiver and the power amplifier, directional coupler and the mixer of the transmitter are integrated in connection with the filter section. The active components are integrated with the filter so that the entity forms one component on the circuit board of the telephone.

Claims

1. A radio transceiver comprising a receiver section, a transmitter section, a switching means section, and a filter section, said receiver, transmitter, and switching means sections being collectively formed on at least two physically separable components, all sections being mounted on a single common support structure and connected by conducting paths associated with said support structure to thereby form a discrete structural entity, wherein the impedance characteristics of said connected transceiver sections on said single common support structure are substantially optimally matched, and further wherein:

said receiver section comprises a low noise amplifier, and a first mixer;

said transmitter section comprises a power amplifier, a directional coupler, and a second mixer;

said switching means is connected between said filter and said transmitter and receiver sections to thereby form an antenna switch; and

said filter section comprises transmission line resonators and an electrically conducting protective cover, wherein said transmitter section and receiver section are located within said conducting protective cover.

2. A radio transceiver according to claim 1, wherein the filter section comprises a single filter which has a certain pass-band range and which is common to the transmitter section and the receiver section.

3. A radio transceiver according to claim 2, wherein the certain pass-band range of the filter section can be adjusted to a desired range in response to a control signal.

4. A radio transceiver according to claim 1, wherein the filter section comprises a transmitter branch filter and a receiver branch filter, each said filter containing transmission line resonators and having matching circuits to couple the transmission line resonators in each said filter, to couple said filters to said transceiver, and to match the filters to the antenna.

5. A radio transceiver according to claim 1, wherein the resonators are helix resonators.

6. A radio transceiver according to claim 1, wherein the resonators are dielectric resonators.

7. A radio transceiver according to claim 1, wherein the resonators are stripline resonators.

8. A radio transceiver according to claim 1, wherein the filter section comprises a Surface Acoustic Wave filter.

9. A radio transceiver according to claim 1, wherein the receiver section and the transmitter section are realized with physically separable components.

10. A radio transceiver according to claim 1, wherein the receiver section and the transmitter section are realized on one integrated circuit physically separable from said switching means section.

11. A radio transceiver according to claim 1, further comprising input and output nodes located between said low noise amplifier and said first mixer to which a filter may be attached.

12. A radio transceiver according to claim 1, further comprising input and output nodes located between said second mixer and said power amplifier to which a filter may be attached.

13. A radio transceiver comprising a receiver section, a transmitter section, a switching means section, and a filter section all mounted on a common support structure and connected by conducting paths associated with said support structure to thereby form a discrete structural entity, wherein the impedance characteristics of said connected transceiver components on said common support structure are substantially optimally matched, and further wherein:

said receiver section comprises a low noise amplifier, and a first mixer;

said transmitter section comprises a power amplifier, a directional coupler, and a second mixer;

said switching means is connected between said filter and said transmitter and receiver sections to thereby form an antenna switch; and

said filter section comprises transmission line resonators and an electrically conducting protective cover, wherein said transmitter section and receiver section are located within said conducting protective cover;

wherein said switching means section and filter section comprise passive components and the receiver section, the transmitter section and at least one of said passive components are realized with a multi-chip module method.