CN214480594U

CN214480594U - Radio frequency circuit and electronic device

Info

Publication number: CN214480594U
Application number: CN202120975163.7U
Authority: CN
Inventors: 王润泽; 彭永亮
Original assignee: Guangdong Genius Technology Co Ltd
Current assignee: Guangdong Genius Technology Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-10-22
Anticipated expiration: 2031-04-28

Abstract

The application relates to and belongs to electronic circuit technical field, relates to a radio frequency circuit and electronic equipment, and the radio frequency circuit includes: a power amplifier for receiving an antenna signal; the first ends of the SAW filters are connected with different output ends of the power amplifier in a one-to-one correspondence mode and used for receiving electric signals of different frequency bands; and one input end of the radio frequency transceiver is connected with the second end of the SAW filter, and the radio frequency transceiver receives the filtered electric signal output by the SAW filter. Through setting up many input, single output's SAW filter, the signal of telecommunication that is used for receiving the antenna after the amplification is filtered, later exports the radio frequency transceiver, owing to only occupy a port of radio frequency transceiver, has saved the single-pole double-throw switch, has reduced the cost of product, has also practiced thrift the product area simultaneously.

Description

Radio frequency circuit and electronic device

Technical Field

The application belongs to the technical field of electronic circuits, and particularly relates to a radio frequency circuit and electronic equipment.

Background

A Surface Acoustic Wave (SAW) device is a circuit element that converts an electric signal into a Surface Wave and processes the Surface Wave, and is widely used as a filter, a resonator, and the like.

When designing a radio frequency circuit, a situation that a plurality of frequency bands are desired to be made, but a port supported by a Power Amplifier (PA) is not enough occurs, and a dual SAW device is generally selected to combine two frequency bands into one path to realize one input and multiple output. However, if the transceiver port is not enough, two SAW receiving end devices can be selected and used, and a single-pole double-throw switch is added to form a circuit, so that the cost is increased, and the occupied area is increased.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a radio frequency circuit and electronic equipment, and aims to solve the problems that a traditional radio frequency circuit is high in cost and large in occupied area.

A first aspect of an embodiment of the present application provides a radio frequency circuit, including:

a power amplifier for receiving an antenna signal;

the SAW filter is provided with at least two first ends and a second end, the first ends of the SAW filter are correspondingly connected with different output ends of the power amplifier in a one-to-one mode and used for receiving electric signals of different frequency bands, and the SAW filter is used for filtering the electric signals;

and one input end of the radio frequency transceiver is connected with the second end of the SAW filter, and receives the filtered electric signal output by the SAW filter.

Optionally, the SAW filter has two first ends.

Optionally, the first terminal of the SAW filter is an output terminal of the device calibration, and the second terminal of the SAW filter is an input terminal of the device calibration.

Optionally, the antenna signal received by the power amplifier at a time is a single frequency band signal.

Optionally, the frequency band is an LTE frequency band.

Optionally, the frequency band is a GNNS frequency band.

A second aspect of embodiments of the present application provides an electronic device, including an antenna, and a radio frequency circuit as described above connected to the antenna.

Optionally, the antenna may transceive antenna signals of multiple frequency bands.

The radio frequency circuit is provided with the multi-input single-output SAW filter, and is used for filtering electric signals received by the amplified antenna and then outputting the electric signals to the radio frequency transceiver.

Drawings

Fig. 1 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 shows a schematic structural diagram of a radio frequency circuit provided in an embodiment of the present application, and for convenience of description, only parts related to the embodiment are shown, which are detailed as follows:

the radio frequency circuit comprises a power amplifier 11, a SAW filter 12 and a radio frequency transceiver 13, wherein the power amplifier 11 is used for receiving antenna signals; the SAW filter 12 has at least two first terminals and a second terminal, the first terminals of the SAW filter 12 are connected to different output terminals of the power amplifier 11 in a one-to-one correspondence manner, so as to receive electrical signals of different frequency bands, and the SAW filter 12 is used for filtering the electrical signals; an input terminal of the radio frequency transceiver 13 is connected to the second terminal of the SAW filter 12, and receives the filtered electrical signal output by the SAW filter 12. Because one input end of the radio frequency transceiver 13 is directly connected with the output of the single-output SAW filter 12, a single-pole double-throw switch is omitted, the cost and the port of the radio frequency transceiver 13 are saved, and meanwhile, the area of a circuit board occupied by a radio frequency circuit is reduced.

Generally, an antenna can receive signals of multiple frequency bands, but at one moment (or in an operating state), the antenna should resonate in an operating frequency band, and transmit an antenna signal of one frequency band to the power amplifier 11 of the radio frequency circuit, so that the antenna signal received by the power amplifier 11 at one moment is a signal of a single frequency band. The power amplifier 11 amplifies the antenna signal of the frequency band and inputs the amplified signal to the SAW filter 12, and the SAW filter 12 also filters the electric signal and inputs the filtered signal to the radio frequency transceiver 13. In the present application, the power amplifier 11 and the radio frequency transceiver 13 are not limited, and may be selected according to an application scenario.

For SAW filter 12, a first terminal of SAW filter 12 is used as an input of the device in the rf circuit of the present application, and a second terminal of SAW filter 12 is used as an output of the device. While SAW filters 12 are generally available in the market as single input single output, single input multiple output or the same number of inputs and outputs. Therefore, in one embodiment of the present application, the single-input multiple-output SAW filter 12 is put to practical use in reverse, that is, the output of the general single-input multiple-output SAW filter 12 is used as the input of the SAW filter 12 of the present application, and the input of the general single-input multiple-output SAW filter 12 is used as the output of the SAW filter 12 of the present application. Stated another way, the first terminal of SAW filter 12 in this application is the output terminal of a device calibration (e.g., as indicated in the data sheet (DataSheet) for SAW filter 12), and the second terminal of SAW filter 12 is the input terminal of the device calibration.

Alternatively, SAW filter 12 has two first terminals, i.e., a single input two output device is used. Of course, more than three devices at the first end of the SAW filter 12 may be used as required.

Optionally, the frequency band is a Long Term Evolution (LTE) frequency band, such as band 34, band 39, band 40, and the like, that is, the radio frequency circuit may be applied in a mobile communication network. Alternatively, the frequency band may be a Global Navigation Satellite System (GNNS) frequency band.

A second aspect of embodiments of the present application provides an electronic device, such as a wearable device like a smart watch, or a smart terminal. The electronic equipment comprises an antenna and the radio frequency circuit connected with the antenna. Alternatively, the antenna may transceive antenna signals of a plurality of the above-mentioned frequency bands.

The radio frequency circuit is used for filtering an electric signal received by the amplified antenna by arranging the SAW filter 12 with multiple inputs and single output and then outputting the electric signal to the radio frequency transceiver 13, and only one port of the radio frequency transceiver 13 is occupied, so that a single-pole double-throw switch is omitted, the cost of a product is reduced, the area of the product is saved, and the layout of the circuit and the miniaturization of the product are facilitated.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A radio frequency circuit, comprising:

a power amplifier for receiving an antenna signal;

2. The radio frequency circuit of claim 1, wherein the SAW filter has two first terminals.

3. A radio frequency circuit as claimed in claim 1 or 2, wherein the first terminal of the SAW filter is a device scaled output terminal and the second terminal of the SAW filter is a device scaled input terminal.

4. The radio frequency circuit of claim 1, wherein the antenna signal received by the power amplifier at one time is a single frequency band signal.

5. A radio frequency circuit as claimed in claim 1 or 4, wherein the frequency band is an LTE frequency band.

6. A radio frequency circuit according to claim 1 or 4, characterized in that said frequency band is the GNNS frequency band.

7. An electronic device comprising an antenna, further comprising the radio frequency circuitry of any of claims 1 to 6 connected to the antenna.

8. The electronic device of claim 7, wherein the antenna is capable of transceiving antenna signals for a plurality of frequency bands.

9. The electronic device of claim 7, wherein the electronic device is a wearable apparatus.