CN203104439U - Multiband antenna radio-frequency circuit - Google Patents

Abstract

The utility model discloses a multiband antenna radio-frequency circuit which is used in the technical field of a wireless terminal. The multiband antenna radio-frequency circuit comprises a plurality of Pi-like match circuits arranged between and connected with an antenna and a switching circuit and the switching circuit arranged between and connected with an RF signal transmitter/receiver and the plurality of Pi-like match circuits. According to embodiments in the utility model, antenna match circuits corresponding to signals of different frequency bands are allocated so as to allow each frequency band signal to have optimized wireless performance.

Description

The multiband aerial radio circuit

Technical field

The utility model relates to technical field of wireless terminals, specifically more relates to a kind of multiband aerial radio circuit.

Background technology

The communication capacity of portable radio terminal depends on its various antennas and realizes, antenna uses plain conductor, metal covering or other dielectric materials to constitute definite shape, be erected at certain space, thereby the radio-frequency electrical energy of signal transmitter emission is converted to electromagnetic wave to space radiation, or will be converted to radio-frequency electrical energy in the electromagnetism wave energy of spatial transmission and feed back to receiver.The kind of antenna is a lot, is designed in the wireless terminal of small size, very thin and lightweight and various radio-frequency enabled are provided.

In order to cooperate different application demands,, there are a lot of wireless terminals to be equipped with the antenna of multiband at present simultaneously in order to promote the network use amount.But for wireless terminal with multiband, the all working frequency range that adopts an antenna-matching circuit and antenna body to be fit to the terminal body is usually gone up in its design, wireless performance for each frequency range of balance, thereby can not make all frequency range performances all reach maximization, thereby reduce the communication performance of wireless terminal.

As shown in Figure 1, Fig. 1 is the schematic diagram on traditional antenna match sky road, and this circuit presents the π type:

R01, C01, L01 forms the π type match circuit of antenna ANTENNA body, also can be designed as two L types, or its alloytype.Present general implementation is to adopt match circuit and antenna body among Fig. 1 to be applicable to each frequency range that wireless terminal is worked, π type match circuit is used for Antenna Impedance Matching, the wireless performance that needs each frequency range of balance, thereby can't accomplish to make the radiance of each band antenna to reach optimization.

The utility model content

The purpose of the utility model embodiment is for a kind of multiband aerial radio circuit is provided, and makes the wireless performance of each frequency range of the wireless product of multiband reach optimization.

In order to reach above-mentioned utility model purpose, the multiband aerial radio circuit that the utility model embodiment proposes is achieved through the following technical solutions:

The multiband aerial radio circuit, described multiband aerial radio circuit comprises:

Several π type match circuits are connected between antenna and the switching circuit;

Switching circuit is connected between RF signal transmitter/receiver and described several π type match circuits.

The utility model embodiment is by providing a kind of multiband aerial radio circuit, for the signal of different frequency ranges is equipped with oneself antenna-matching circuit, makes each frequency band signals can obtain optimized wireless performance.

Description of drawings

By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.

Fig. 1 is the schematic diagram of traditional π type match circuit and antenna match;

Fig. 2 is the coupling schematic diagram of the radio-frequency line of the utility model π type match circuit and different antennae frequency range.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 2, be the composition schematic diagram of the utility model embodiment multiband aerial radio circuit, described multiband aerial radio circuit comprises:

Several π type match circuits are connected between antenna and the switching circuit;

Switching circuit is connected between RF signal transmitter/receiver and described several π type match circuits.

Wherein, described switching circuit comprises:

VCC logic controller, described VCC logic controller number are set according to the frequency range number and are arranged;

Enable Pin links to each other respectively with RF signal reception/transmitter with described VCC logic controller.

As Fig. 2, the function of switching circuit Switch is according to the difference of frequency range signal separately to be separated, and radio frequency rf signal is directed to (Route1, Route2 on the different separately paths ...).

Described switching circuit can expand to the control to some frequency ranges, for example when two frequency ranges, described switching circuit comprises VCC1 and VCC2, belong to which frequency range according to present signal and carry out logic control, such as VCC1 is high, VCC2 can set frequency range P1 of control for low, and VCC1 is high, and VCC2 is that height can be set another frequency range of control P2.The number of VCC can be done suitable expansion again according to what of frequency range, when the frequency range number is N(N〉2) time, the number of VCC is N+1.

In addition, path Route can be according to the suitable expansion of how much doing of frequency range, antenna-matching circuit of every paths Route coupling, and mate an antenna frequency range.

As shown in Figure 2, under the performance, R020, R021, R022 are the antenna-matching circuits on the Route1 of path; R030, R031, R032 are the antenna-matching circuits on the Route2 of path; R040, R041, R042 are the antenna-matching circuits on the Route3 of path.The signal that Fig. 2 shows different frequency ranges has the antenna-matching circuit of oneself, and each road signal can obtain optimized wireless performance like this.

Under the other performance, π type match circuit can be determined to adopt the combination of inductance, electric capacity or electricity group by needs, and the utility model embodiment can be applicable to any multiband wireless product with antenna, such as: mobile phone, the multiband wireless router, broadcast receiver ... .. or the like.

The utility model embodiment is by providing a kind of multiband aerial radio circuit, by being the antenna-matching circuit that the signal of different frequency range is equipped with oneself, makes each frequency band signals can obtain optimized wireless performance.

The utility model one of ordinary skill in the art be appreciated that; the above embodiment of the utility model only is one of preferred embodiment of the present utility model; be the length restriction; here can not all execution modes of particularize; any enforcement that can embody the utility model claim technical scheme is all in protection range of the present utility model.

It should be noted that; above content is to further describing that the utility model is done in conjunction with concrete execution mode; can not assert that embodiment of the present utility model only limits to this; under above-mentioned guidance of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement or distortion drop in the protection range of the present utility model.

Claims (3)

1. the multiband aerial radio circuit is characterized in that, described multiband aerial radio circuit comprises:

Several π type match circuits are connected between antenna and the switching circuit;

Switching circuit is connected between RF signal transmitter/receiver and described several π type match circuits.

2. multiband aerial radio circuit as claimed in claim 1 is characterized in that, described switching circuit comprises:

VCC logic controller, described VCC logic controller number are set according to the frequency range number and are arranged;

Enable Pin links to each other respectively with RF signal reception/transmitter with described VCC logic controller.

3. multiband aerial radio circuit as claimed in claim 2 is characterized in that, described several π type match circuits are made up of resistance, electric capacity or inductor combination respectively.

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