KR200290120Y1 - One-loop feeding duplexer for improving PIM - Google Patents

Abstract

The present invention relates to a duplexer used in various communication systems, and more particularly, to a duplexer using a one-loop feeding method to improve Passive Inter-modulation (PIM).

The coupling loop structure of the duplexer according to the prior art generally uses two coupling loops 102-1 and 102-2 connected by soldering to the common connector 101, respectively, by soldering to the dielectric resonator 103 of the transmitting and receiving side. It connects and transmits and receives signals through independent loops. Such a structure is mainly used because of easy circuit configuration, but PIM is generated a lot due to four soldering sites. In addition, there is a manufacturing problem in that the positions of the two loops 102-1 and 102-2 must be aligned in order to adjust the phase so as not to influence each other between the transmission and reception signals.

In order to solve the above problems, the present invention is used in various RF communication fields such as cellular mobile phone, personal mobile communication, next generation mobile communication (IMT-2000), and in the duplexer for combining or separating signals, single loop The use of a feed method improves PIM by reducing connections and provides a single loop feed duplexer for PIM improvement that simplifies the manufacturing process and improves productivity.

Description

One-loop feeding duplexer for improving PIM}

The present invention relates to a duplexer used in various communication systems, and more particularly, to a duplexer using a one-loop feeding method to improve Passive Inter-modulation (PIM).

Recently, various problems have been sought to solve the problem of the IM, that is, the PIM of the RF passive device around the world, and one of them has been proposed to reduce the connection in the circuit.

Here, inter-modulation (IM) means that when two or more frequencies pass through a nonlinear system or a circuit, signals that are not present at the input terminal are intermodulated at the output terminal. As a result, the specification of the system also requires broadband and high power. However, due to the high power specification, the resulting IM also increases, and IM rejection technology has become an important factor in determining system performance.

Among the RF passive elements, a duplexer is an essential component in various RF communication fields such as cellular mobile phones, personal mobile communications, and next-generation mobile communications (IMT-2000). The duplexer passes only frequency signals of a specific band and the remaining frequency signals It is a passive element that has the property of attenuation and can share the antenna by combining the transmission signal and the reception signal.

1A is a perspective view illustrating a duplexer using a power feeding method according to the prior art, and FIG. 1B is an enlarged view of a coupling loop, which is a main part of the prior art of FIG. 1A. As shown in the figure, the duplexer according to the prior art and the antenna is connected to the common connector 101 for transmitting and receiving signals; Coupling loops 102-1 and 102-2 connected to the common connector and divided into two loops and connected to respective resonators to transmit radio signals; A dielectric resonator 103 for resonating at a desired frequency; A window (104) for coupling said dielectric resonance period; A housing 107 for receiving the components; And a receiving connector 105 formed on an outer surface of the housing to transmit a signal received from the antenna to system equipment. It consists of a transmission connector 106 for transmitting a signal transmitted from the system equipment.

Referring to the coupling loop structure of the duplexer according to the prior art with reference to Figure 1B, the coupling loop structure shown is a commonly used structure, the two coupling loops 102-1, which are connected by soldering to the common connector 101, 102-2) are connected to the dielectric resonator 103 on the transmitting and receiving side by soldering to transmit and receive signals through independent loops. Such a structure is mainly used because of easy circuit configuration, but PIM is generated a lot due to four soldering sites. In addition, the position between the two loops (102-1, 102-2) in order to adjust the phase so as not to affect each other between the transmission and reception signals, the manufacturing process is complicated and the problem of low productivity.

The present invention has been made to solve the above problems, and provides a single loop feed duplexer for improving PIM by improving the PIM by reducing the connection portion using a single loop feed method and simplifying the manufacturing process. It aims to do it.

Figure 1A is a perspective view of a duplexer using a power feeding method according to the prior art.

1B is an enlarged view of a coupling loop that is an essential part of the prior art.

Figure 2A is a perspective view showing one embodiment of a single loop feed duplexer for improving PIM according to the present invention.

FIG. 2B is a partial cutaway plan view of the PIM improvement single loop feed duplexer of FIG. 2A; FIG.

FIG. 2C is a cross-sectional view of the single loop fed duplexer for improving PIM of FIG. 2A. FIG.

FIG. 2D is an enlarged view of a coupling loop that is a main part of a single loop feed duplexer for improving PIM according to the present invention; FIG.

※ Explanation of code for main part of drawing

101, 201. Common connectors 102-1, 102-2, 202. Coupling loops

103. Dielectric resonators 104, 205. Window

105, 206. Receive connector 106, 207. Transmit connector

107, 208. Housings 202-1, 202-2. Connection

203. Transmission resonator 204-1. Receiver 1st Resonator

204-2. Transmitter end resonator 209. Tuning bolt

210. Receive Feed Loop 211. Send Feed Loop

A duplexer that is used in various RF communication fields such as cellular mobile phones, personal mobile communication, and next generation mobile communication (IMT-2000) to combine or separate transmission and reception signals, and is connected to an antenna to transmit and receive signals. Wow; A coupling loop connected to the common connector to transmit a radio signal; A transmission resonator connected to the coupling loop to transmit a transmission / reception signal; A dielectric resonator for resonating at a desired frequency; A window for coupling the dielectric resonance period; A tuning bolt for frequency fine tuning; A housing for containing the components; And a receiving connector formed on an outer surface of the housing and transmitting a signal received from the antenna to system equipment. And a transmission connector for transmitting a signal transmitted from the system equipment.

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. 2A to 2D are enlarged perspective views, a partially cutaway plan view, a cross-sectional view, and a coupling loop showing an embodiment of the PIM improvement single loop feed duplexer according to the present invention.

As shown, the duplexer according to the present invention uses a one-loop feeding method to improve the PIM, and a separate transmission resonator 203 is provided on a straight line of the single loop to transmit and receive signals. To pass.

The transmission resonator 203 is positioned at the center of the receiving end first resonator 204-1 and the transmitting end resonator 204-2, and is in line with the coupling loop 202 so as to be located in the coupling loop 202. ) Is transmitted to the first stage resonator 204-1 by the reception terminal and the transmission signal transmitted from the system equipment through the transmission terminal final resonator 204-2 in a structure fixed by soldering). It serves to deliver to the common connector 201.

In this case, the coupling loop 202 is one loop, one side of which is fixed to the common connector 201 by soldering or the like, and the other side of the coupling loop 202 is fixed to the transmission resonator 203 by soldering or the like. ) Is designed to improve the PIM by significantly reducing the number of connections to the two locations (202-1 and 202-2) compared to the existing two loop structures.

Next, the operation state according to the structure of the PIM improvement single loop feed duplexer according to the present invention, the signal received through the antenna (not shown) is applied to the coupling loop 202 through the common connector 201 do.

The signal applied to the coupling loop 202 generates an electric potential and a current flow, generates an electric field and a magnetic field in the transmission resonator 203, and transmits the electric field and the magnetic field to the first resonator 204-1. The signal transmitted to the receiving end first resonator is sequentially transmitted while passing the signal between adjacent dielectric resonators through the window 204, and finally through the receiving connector 206 through the receiving connector loop 206. Is delivered to.

Similarly, the transmission signal transmitted from the system equipment is applied to the transmission feed loop 211 through the transmission connector 207, and this signal generates electric potential and current in the first resonator to generate electric and magnetic fields through the window 205. The signal is sequentially transmitted while passing signals between adjacent resonators, and then transmitted to the transmission resonator 203 through the transmission end resonator 204-2, and finally through the coupling loop 202 through the common connector 201. Transmitted to the antenna.

Here, the signal frequency passing through the resonator is determined according to the inductance value of the spacing and length of the housing 208 and the resonator, and the capacitance value of the spacing difference between the tuning bolt 209 and the resonator finely adjusting the frequency. The frequency passband is determined according to the setting of the window 205. Due to this process, the duplexer synthesizes and separates the transmitted signal and the received signal, and passes only frequency signals of a specific band.

Although the present invention has been described and illustrated with respect to specific preferred embodiments, the present invention is not limited to the above-described embodiments, and is intended by those skilled in the art to which the present invention pertains. Various modifications and changes may be made without departing from the spirit of the invention as set forth in the accompanying drawings.

As described above, the present invention can reduce the connection part due to the feeding method composed of one coupling loop and the transmission resonator, which not only improves the PIM, but also increases the production efficiency by simplifying the manufacturing process. There is no need to match the production time is shortened has the effect of improving productivity.

Claims (1)

In the duplexer which is used in various RF communication fields such as cellular mobile phone, personal mobile communication and next generation mobile communication (IMT-2000) to combine or separate the transmitted and received signals, A common connector connected to the antenna for transmitting and receiving signals; A coupling loop connected to the common connector to transmit a radio signal; A transmission resonator connected to the coupling loop to transmit a transmission / reception signal; A dielectric resonator for resonating at a desired frequency; A window for coupling the dielectric resonance period; A tuning bolt for frequency fine tuning; A housing for containing the components; And A reception connector formed on an outer surface of the housing and transmitting a signal received from the antenna to system equipment; And a transmission connector for transmitting a signal transmitted from said system equipment.