KR20010038219A - A duplexer - Google Patents

Abstract

The present invention relates to a transceiver for transmitting and receiving, and transmits and receives a signal received from the antenna ANT to the receiving end (Rx) and transmit and receive distributor 100 for propagating the transmission signal of the transmitting end (Tx) to the air through the antenna (ANT) In the present invention, the transmitter-side filtering unit 110 implements capacitive coupling through a variable capacitance value to provide the antenna ANT with the transmission signal supplied from the transmitter Tx to have a transmission zero in a reception band. And a receiver side filtering unit 120 for implementing the inductive coupling through the variable inductance value so that the received signal from the antenna ANT has a transmission zero in the transmission band and providing the received signal to the receiver Rx. Characterized in that comprises a. Therefore, the transmission side filtering unit 110 is designed directly at the transmitting end Tx to have transmission zero (TRANMISSION ZERO) in the reception band, and the receiving side filtering unit 120 directly adjacent to the receiving end Rx so as to have transmission zero in the transmission band. By designing), the characteristics of the duplexer can be obtained by combining the transmitting side filtering unit 110 and the receiving side filtering unit 120, so that the circuit design is simplified, the manufacturing work, and the productivity is very excellent. There is.

Description

Transmitter and receiver distributor {A DUPLEXER}

The present invention relates to a transmission / reception divider, and more particularly, a transmission side filtering unit is designed directly at a transmitting end to have transmission zero in a reception band, and a reception side filtering unit is designed directly at the receiving end so as to have a transmission zero in the transmission band. And a transmitting / receiving divider capable of adding characteristics of a duplexer by adding a receiving side line.

In general, the transmission and reception distributor performs a function of supplying a high frequency signal introduced from an antenna, that is, a reception signal to a receiver or propagating a transmission signal to the air through the antenna.

As shown in FIG. 1, the transmission / reception divider 10 according to the related art performs a function such as the reception transmission line unit 13 to provide a reception signal received from the antenna ANT to the reception terminal Rx. The reception filter unit 14 has a structure in which the reception filter unit 14 is provided in series, and the transmission filter unit 12 and the transmission transmission line unit 11 are configured to propagate a transmission signal provided from the transmission terminal Tx to the air through the antenna ANT. ) Is provided in series.

Here, the transmission transmission line unit 11 is well matched to the impedance between the source and the load in the transmission band, and has a strong mismatching in the reception band.

On the contrary, the reception transmission line unit 13 is well matched to the impedance between the source and the load in the reception band, and has a strong mismatch in the transmission band.

However, the transmission / reception divider 10 according to the related art having the structure as described above has a problem of complicating the design of the product and increasing the price of the product by increasing the size of the device.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the object of the present invention is to design a transmission-side filtering unit directly at the transmitting end to have a transmission zero in the reception band and at the same time to have a transmission zero in the transmission band. The present invention provides a transmitter / receiver divider that can simplify the circuit design, manufacture the product element, and improve the productivity of the product element.

1 is a block diagram showing a general transmission and reception distributor.

2 is a block diagram showing a transceiver for transmitting and receiving in accordance with the present invention.

3 is a circuit diagram showing a transceiver for transmitting and receiving in accordance with the present invention.

Figure 4 is a waveform diagram for explaining the transmission and reception divider according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: transmission and reception divider 110: transmitting side filtering unit

111: inductive coupling unit 120: receiving side filtering unit

121: capacitive coupling part ANT: antenna

C1: first capacitance C2: second capacitance

C3: third capacitance C4: fourth capacitance

C5: fifth capacitance C6: sixth capacitance

C _T : variable capacitance L1: first inductance

L2: Second Inductance L _T : Variable Inductance

R1: first resonator R2: second resonator

R3: third resonator R4: fourth resonator

Rx: Receiver Tx: Transmitter

In order to achieve the above object, the present invention provides a transmitting / receiving divider for supplying a received signal from an antenna to a receiving end and propagating a transmitting signal of the transmitting end to the air through the antenna, wherein the transmitting signal supplied from the transmitting end is received in a receiving band. A transmission-side filtering unit that implements capacitive coupling through varying capacitance values to have a transmission zero of 0 and provides the antenna to the antenna, and a variable inductance value of the received signal from the antenna to have a transmission zero in a transmission band. Including the receiving side filtering unit provided to the receiving end by implementing the inductive coupling through the technical features of the technical configuration.

Hereinafter, a preferred embodiment of the transmission and reception distributor according to the present invention will be described with reference to FIGS. 2 to 4.

2 is a block diagram illustrating a transceiver for transmitting and receiving according to the present invention, FIG. 3 is a circuit diagram illustrating a transceiver for transmitting and receiving according to the present invention, and FIG. 4 is a waveform diagram illustrating a transceiver for transmitting and receiving according to the present invention.

FIG. 2 is a block diagram illustrating a transmission / reception divider 100 according to the present invention. The transmission filtering unit 110 directly connected to the transmitting end Tx from an antenna ANT has a transmission zero in a reception band as shown in FIG. The receiver filtering unit 120 having a transmission zero and directly connected to the receiver Rx from the antenna ANT has a transmission zero in the transmission band.

It can be seen that this structure eventually eliminates the need for a separate matching circuit such as the transmission transmission line portion or the reception transmission line portion shown in FIG.

FIG. 3 is a circuit diagram illustrating a transmission / reception divider 100 according to the present invention. The receiving end Rx receiving the received signal from the antenna ANT and the transmitting end Tx supplying the transmitting signal to the antenna ANT are shown in FIG. It is made of a provided structure.

In this case, the first resonator R1 and the second resonator R2 constituting the transmitting side filtering unit 110 are for transmission, and the third resonator R3 constituting the receiving side filtering unit 120 is provided. And the fourth resonator R4 is for reception. The first resonator R1, the second resonator R2, the third resonator R3, and the fourth resonator R4 are connected to ground, respectively, and the first resonator R1 has an external coupling capacitance. The first resonator C1 is connected to the transmitting terminal Tx, and the second resonator R2 is connected to the antenna ANT through a second capacitance C2 which is an external coupling capacitance. R3 is connected to the antenna ANT through a third capacitance C3 which is an external coupling capacitance, and the fourth resonator R4 is a receiving end Rx through a fourth capacitance C4 which is an external coupling capacitance. Is connected to.

In addition, an inductive coupling unit 111 is provided between the first resonator R1 and the second resonator R2 to have a transmission zero in a specific frequency band desired, that is, to have a transmission zero over a desired transmission band. The inductive coupling unit 111 may vary a variable inductance L _T and a first in parallel so as to adjust the coupling between the first resonator R1 and the second resonator R2 by varying the inductance value. It consists of an inductance L1 and a fifth capacitance C5.

On the contrary, a capacitive coupling portion 121 is provided between the third resonator R3 and the fourth resonator R4 so as to have a transmission zero under a desired reception band. The capacitive coupling portion 121 is provided. Is a variable capacitance C _T , a second inductance L 2, and a sixth capacitance, which are implemented in parallel to adjust coupling between the third resonator R3 and the fourth resonator R4 by varying the capacitance value. C6).

Here, a variable variable inductance L _T or a variable capacitance for adjusting the coupling between the first resonator R1 and the second resonator R2 or the third resonator R3 and the fourth resonator R4. (C _T ) may exist in the dielectric body portion, which is one element, or may be provided as an individual element.

The circuit of the transmission / reception divider 100 by such a design not only obtains the characteristics of the duplexer by combining the transmission line and the reception line, but also simplifies the design thereof, thereby greatly improving the manufacturing work and productivity of the product. It can be seen that it works.

As described above, according to the transmission / reception divider 100 according to the present invention, the transmission side filtering unit 110 is designed directly at the transmission end Tx to have transmission zero in the reception band, and the reception end (0) has transmission zero in the transmission band. Rx) has a structure in which the receiving side filtering unit 120 is designed directly, so that the characteristics of the duplexer can be obtained by combining the transmitting side filtering unit 110 and the receiving side filtering unit 120, thereby simplifying circuit design and The manufacturing work and productivity are very good.

Claims (5)

In the transmission and reception distributor 100 for supplying a reception signal from the antenna ANT to the receiving end (Rx) and propagating the transmission signal of the transmitting end (Tx) to the air through the antenna (ANT), A transmission-side filtering unit 110 implementing capacitive coupling through a variable capacitance value to provide the transmission signal supplied from the transmission terminal Tx to the antenna ANT to have a transmission zero in a reception band; Including the receiving side filtering unit 120 to implement the inductive coupling through the variable inductance value to have a transmission zero in the transmission band received from the antenna ANT to the receiving end (Rx) Transmitter and receiver distributor, characterized in that made. The method of claim 1, The transmitting side filtering unit 110, A first capacitance C1 and a second capacitance C2 implemented to be serially connected to the transmitting terminal Tx and the antenna ANT, A first resonator connected sequentially to the first capacitance C1 and filtering signals of a transmission band supplied from the transmission terminal Tx and then transmitting the first resonator C2 to the antenna ANT via the second capacitance C2 ( R1) and the second resonator R2, An inductive coupling part 111 connected between the first resonator R1 and the second resonator R2 to adjust transmission zero on the transmission band; The method of claim 1, The receiving side filtering unit 120, A third capacitance C3 and a fourth capacitance C4 implemented to be serially connected to the antenna ANT and the receiving end Rx, A third resonator sequentially connected to the third capacitance C3 and filtering signals of a reception band supplied from the antenna ANT and then transmitting to the receiving terminal Rx via the fourth capacitance C4 ( R3) and the fourth resonator R4, Transmitting and receiving distributor 100, characterized in that it comprises a capacitive coupling unit 121 is connected between the third resonator (R3) and the fourth resonator (R4) to adjust the transmission zero appears below the reception band. . The method of claim 2, The inductive coupling unit 111, Variable inductance L _T , first inductance L 1, and fifth capacitance C 5 implemented in parallel to adjust coupling between the first resonator R1 and the second resonator R2 by varying inductance values. Transmitter and receiver distributor, characterized in that it comprises a). The method of claim 3, wherein The capacitive coupling unit 121 is, A variable capacitance (C _T ), a second inductance (L2), and a sixth capacitance (C6) implemented in parallel to each other to adjust the coupling between the three resonator and the fourth resonator (R4) by varying the capacitance value Transmitter and receiver distributor, characterized in that made.