CN202978836U

CN202978836U - 5 GHz frequency range high power synthesis circuit applied to wireless local area network (WLAN) products

Info

Publication number: CN202978836U
Application number: CN 201220734998
Authority: CN
Inventors: 陶海宝; 刘德银; 段文虎; 韩琪定; 袁丛清
Original assignee: Shenzhen Gongjin Electronics Co Ltd
Current assignee: Shenzhen Gongjin Electronics Co Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-06-05
Anticipated expiration: 2022-12-28

Abstract

The utility model discloses a 5 GHz frequency range high power synthesis circuit applied to wireless local area network (WLAN) products. The 5 GHz frequency range high power synthesis circuit applied to the WLAN products comprises a power allocation LC unit circuit, a power synthesis LC unit circuit and a power amplifier tube, an input signal is output after being allocated by the power allocation LC unit circuit, sent to the input end of the power synthesis LC unit circuit after being amplified by the power amplifier tube, and output after being synthesized by the power synthesis LC unit circuit. According to the 5 GHz frequency range high power synthesis circuit applied to the WLAN products, a separation component L and C network is utilized to form the power synthesis circuit, compared with a common 3 dB bridge or a combiner, the width of the 5 GHz frequency range high power synthesis circuit applied to the WLAN products can be over 1 GHz, insertion loss is less than 3.1 dB, isolation is less than -2.5 dB, and standing wave ratio can be less than 1.5; and production cost is greatly reduced, working consistency is good, and mass production can be achieved.

Description

A kind of high power combiner circuit that is applied to wlan product 5GHz frequency range

Technical field

The utility model relates to a kind of simple and clear temperature control circuit, the simple and clear circuit of especially a kind of temperature control for the WLAN outdoor equipment.

Background technology

In today that the 4G network is not also laid on a large scale, be that 3G or traditional wireless communication technologys such as GSM all can't satisfy the business demand that the consumer downloads, watches HD video for two-forty.This just makes operator increasing for WIFI business demand amount, and the client requires more and more higher for the convenience of two-forty online.When WIFI had just begun to lay several years ago, the use of wireless access point device was only also to be confined to a lot of public area of the stream of people such as airport, coffee shop, commercial square.And in today of consumer electronics product fast development, the portable sets such as notebook computer, intelligent mobile phone, panel computer nearly all dispose the wireless network card of supporting the 802.11n agreement, satisfy consumer's two-forty online demand in any place fully, it is indoor that this just makes the placement location of wireless access point device not to be confined to again, and the outdoor wireless local area network access point product also produces immediately.With respect to indoor focus AP (the ACCESS POINT of putting the dress type, device of wireless local area network access point), outdoor high-power AP requires to have following characteristics under the high rate communication condition: the ability of long-distance transmissions, and signal cover is larger, the signal transmission quality is higher, antijamming capability is stronger; And the operational environment of outdoor AP will will be below-40 ℃ or the temperature requirement more than 60 ℃ at environment, also to consider the job stability under the harsh climate factor, waterproof, antirust, lightning protection facility are all indispensable, but this just mean outdoor AP be not only under harsh environment work, the requirement of the aspect such as stability of equipment, radio-frequency (RF) index, working life is low not at all; And existing AP is generally the design of adopting business level, the very important factor that will consider when the cost of product is design.

The outdoor cover type AP of current customer demand proposes to explicitly call in the transmitting power of 5.8GHz working frequency range: full power output 27dBm is 500mW, to satisfy enough wide remote covering power.The peak power output that industry can be accomplished for 5.8GHz frequency range single tube at present is only also single tube output 25dBm, and single the power amplifier that therefore can be mass does not reach this requirement of 500mW; In order to solve this technical problem and for the consideration of cost factor, to propose the method for using power synthetic.Traditional power synthetic technique has: microstrip line closes road, power splitter and closes road, 3dB electric bridge combination road.And microstrip line closes the road consistency and productibility is relatively poor, and power splitter and 3dB electric bridge combination road cost are too high again.

The utility model content

The purpose of this utility model is to provide the high power combiner circuit that is used for wlan product 5GHz frequency range that a kind of production cost is low, power is large, loss is low.

For addressing the above problem, technical solution adopted in the utility model is: a kind of high power combiner circuit that is applied to wlan product 5GHz frequency range, comprise power division lc unit circuit, the synthetic lc unit circuit of power and power tube, input signal is output after power division lc unit circuit distributes, the input of the synthetic lc unit circuit of power is sent in output after power tube amplifies, output after the synthetic lc unit circuit of power is synthetic.

Described power division lc unit circuit comprises inductance L 1, L2, capacitor C 1～C8, resistance R 1, wherein capacitor C 1=C7=C8 is three port capacitances, inductance L 1, L2, capacitor C 2, C3, C4, C5, C6 have consisted of the LC match circuit, and R1 is the isolation resistance between VIN1, VIN2 two-port.

The synthetic lc unit circuit of described power comprises inductance L 3, L4, capacitor C 9～C16, resistance R 2, wherein capacitor C 9=C10=C16 is three port isolation electric capacity, inductance L 3, L4, capacitor C 11, C12, C13, C14, C15 have consisted of the LC match circuit, and R2 is the isolation resistance between VOUT1, VOUT2 two-port.

The beneficial effect that adopts technique scheme to produce is: the utility model utilizes discrete device L, C network to consist of power synthesis circuit, with respect to common 3dB electric bridge or mixer, more than its bandwidth can be accomplished 1GHz, Insertion Loss＜3.1dB, isolation＜-25dB, standing-wave ratio can accomplish below 1.5; And greatly reduced production cost, the consistency of work is better, can realize producing in enormous quantities.

Description of drawings

Fig. 1 is the utility model circuit block diagram;

Fig. 2 is the LC power synthesis circuit schematic diagram that the utility model proposes;

Fig. 3 is lc circuit impedance variation topological diagram;

Fig. 4 is lc circuit S parameter characteristic figure.

Embodiment

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

As shown in Figure 1, this novel power division lc unit circuit, the synthetic lc unit circuit of power and power tube of comprising, input signal is output after power division lc unit circuit distributes, the input of the synthetic lc unit circuit of power is sent in output after power tube amplifies, output after the synthetic lc unit circuit of power is synthetic.

This new-type circuit principle as shown in Figure 2, wherein VIN is input signal, is divided into two paths of signals after power division lc unit circuit, is respectively VIN1, VIN2, wherein VIN1=VIN2=VIN-3DB.VIN1, VIN2 respectively after power tube PA1, PA2 amplify, output signal VOUT1, VOUT2, then synthesize VOUT through the synthetic lc unit circuit of power.In described power division lc unit circuit, capacitor C 1=C7=C8 is three port capacitances, inductance L 1, L2, capacitor C 2, C3, C4, C5, C6 have consisted of the LC match circuit, and resistance R 1 is the isolation resistance between VIN1, VIN2 two-port, and effect is the isolation that improves between two-port.In like manner, in the synthetic lc unit circuit of power, capacitor C 9=C10=C16 is three port isolation electric capacity, and inductance L 3, L4, C11, C12, C13, C14, C15 have consisted of another LC match circuit, and resistance R 2 is the isolation resistance between VOUT1, VOUT2 two-port.

As shown in Figure 3, Z0 is the impedance of power division lc unit 1 circuit input signal inbound port VIN, and Z2, Z3 are respectively the output impedance of VIN1, VIN2 two-port; Zc2, Zc3 are the impedance of a pair of differential lines, and wherein the microstrip line impedance variation need be followed following relation: Z2=K*Z0, Z3=Z0/K, and due to Z0=Z2=Z3=50ohm, thus K=1, and

Aspect microstrip line length, if design need to have very high requirement for standing wave and isolation, will satisfy ZC2, the caused phase place of ZC3 section microstrip line is changed to 90 °, so two ends microstrip line line length should be 1/4 wavelength as far as possible.

Shown in Figure 4 is S parameter waveform to the emulation of lc unit match circuit.Near 5.8GHz, insertion loss is S12=3.02dB, return loss S11＜-25dB, isolation S23＜-25dB.

Claims

1. high power combiner circuit that is applied to wlan product 5GHz frequency range, it is characterized in that: comprise power division lc unit circuit, the synthetic lc unit circuit of power and power tube, input signal is output after power division lc unit circuit distributes, the input of the synthetic lc unit circuit of power is sent in output after power tube amplifies, output after the synthetic lc unit circuit of power is synthetic.

2. a kind of high power combiner circuit that is applied to wlan product 5GHz frequency range according to claim 1, it is characterized in that described power division lc unit circuit comprises inductance L 1, L2, capacitor C 1～C8, resistance R 1, wherein capacitor C 1=C7=C8 is three port capacitances, inductance L 1, L2, capacitor C 2, C3, C4, C5, C6 have consisted of the LC match circuit, and R1 is the isolation resistance between VIN1, VIN2 two-port.

3. a kind of high power combiner circuit that is applied to wlan product 5GHz frequency range according to claim 1, it is characterized in that the synthetic lc unit circuit of described power comprises inductance L 3, L4, capacitor C 9～C16, resistance R 2, wherein capacitor C 9=C10=C16 is three port isolation electric capacity, inductance L 3, L4, capacitor C 11, C12, C13, C14, C15 have consisted of the LC match circuit, and R2 is the isolation resistance between VOUT1, VOUT2 two-port.