TW201401766A - Filter detection apparatus and method thereof - Google Patents

Abstract

A filter detection apparatus and method thereof mainly comprises a filtering module and a power detection module, wherein the filtering module includes a filter circuit and at least one directional coupler. The filter and the directional coupler are electrically connected, and used to determine the input signal current of the directional coupler, further, the power detection module comprises a directional coupler and a detection circuit. The said directional coupler and the directional coupler of the filter module are electrically connected by inductive coupling way, and the detection circuit is composed by plurality of filtering unit and rectifying unit, via the series form to form a voltage input line and a voltage output line, thereby performs harmonics filter out and detects whether the load condition is completely matched at the same time.

Description

Filter detecting device and method thereof

The invention relates to a filtering detecting device, in particular to a filtering detecting device and method for filtering and detecting a high-power radio frequency amplifier.

Since high-power RF amplifiers are used, two important influencing factors must be considered. One is the output harmonics, because excessive output harmonics will occupy interference in other frequency bands, and the other is the output load. Mismatch, in the case of load mismatch, it is very likely that the RF generator is directly burned due to the excessive standing wave generated. Therefore, the current RF amplifier uses filters and output power detectors for use. To filter out and detect the out-of-band harmonics and load matching generated by the output.

The filter and the output power detector generally used in combination with the RF amplifier are as shown in the block diagram of the first figure. The filter and the output power detector are connected in series to filter the input signal and Detect to confirm whether the signal generated by the RF amplifier has out-of-band harmonics and load matching.

However, due to the operating characteristics of the filter and the output power detector, the internal inductance and capacitance components are greatly different in the process. In order to satisfy the signal bandwidth range of hundreds of MHz to several GHz, the filter can be operated. The components used are quite high, such as inductive components made of ceramics, and the output power detector is used for the detection of special diodes. The requirements of the inductive components are not high, so that the two The component levels are too different. If filtering and detecting in series, especially for high-power RF amplifiers, the output power detector will lose its proper function or even burn out.

In view of the above-mentioned shortcomings, the main object of the present invention is to provide a filter detecting apparatus and a method thereof, which integrate the existing filter and the output power detector circuit in parallel to simultaneously filter out harmonics and detect whether the load condition is complete. Matches and can withstand the signals input by high power RF amplifiers.

In order to achieve the above object, the present invention mainly provides a filter detecting device and a method thereof, which mainly include a filter module and a power detecting module, wherein the filter module includes a filter circuit and at least one directional coupling circuit. The filter circuit is composed of a plurality of inductor elements and a plurality of capacitor elements, and the directional coupling circuit is composed of at least one microstrip line and at least one inductor element, and the directional coupling circuit forms an electric power with an input end and an output end. And the filter circuit is electrically connected to the directional coupling circuit for reading the signal current input by the directional coupling circuit, and the power detecting module comprises a directional coupling circuit and a detecting circuit, wherein the The directional coupling circuit is composed of at least one microstrip line and at least one inductive component, and is electrically connected to the directional coupling circuit of the filter module in a horizontal coupling or a vertical coupling manner, and the detecting circuit is electrically connected to the directional coupling circuit. Sexual connection, the detection circuit is composed of a complex filtering unit and a rectifying unit, and the filtering unit and the rectifying unit Forming a voltage input column and a voltage output column in series, and the voltage input column and the voltage output column are respectively electrically connected by a filtering unit connected in series, a rectifying unit and a series filtering unit, and finally the voltage input column And the voltage output column is electrically connected to a micro control module for interpreting the voltage values transmitted by the voltage input column and the voltage output column.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The contents of the present invention are described in conjunction with the drawings:

Please refer to the second figure, which is a block diagram of the structure of the present invention. As shown in the second figure, the filter detection device of the present invention mainly includes a filter module 1 and a power detection module 2, wherein the filter module 1 includes a filter circuit 11 and at least one directional coupling circuit 12, wherein The filter circuit 11 is composed of a plurality of capacitive elements and an inductance element. The filter circuit 11 can be any one of a low-pass filter circuit, a high-pass filter circuit or a band-pass filter circuit, and is matched according to the bandwidth of the connected RF amplifier. The directional coupling circuit 12 is composed of at least one microstrip line and at least one inductive component. The directional coupling circuit 12 is electrically connected to an input terminal 3 and an output terminal 4, and the filter circuit 11 and the directional coupling circuit are electrically connected. 12 is formed to electrically connect the signal current input by the directional coupling circuit 12 and perform filtering; and the power detecting module 2 includes a directional coupling circuit 21 and a detecting circuit 22, wherein the directional coupling The circuit 21 is composed of at least one microstrip line and at least one inductive component, and is electrically coupled to the directional coupling circuit 12 of the filter module 1 by horizontal coupling or vertical coupling induction. The detection circuit 22 is electrically connected to the directional coupling circuit 21, and the detection circuit 22 is composed of a complex filtering unit 221 and a rectifying unit 222. The filtering unit 221 and the rectifying unit 222 are further connected in series. The voltage input column 223 and the voltage output column 224, and the voltage input column 223 and the voltage output column 224 are respectively electrically connected by a filtering unit 221 in series with a rectifying unit 222 and then connected in series with a filtering unit 221, and finally the voltage is formed. The input column 223 and the voltage output column 224 are electrically connected to a micro control module 5 for interpreting the voltage values transmitted by the voltage input column 223 and the voltage output column 224. Further, the rectifying unit 222 is a plurality of The diodes are arranged in series such that the forward voltage of the output can reach a certain value, so that the voltage input column 223 and the voltage output column 224 are finally The transmitted voltage value is not misjudged by the micro-control module 5 or cannot be interpreted.

Please refer to the third figure, which is a schematic diagram of the operation of the present invention. After the signal current enters the direction coupling circuit 12 of the filter module 1 via the input terminal 3, the filter circuit 11 directly interprets the bandwidth of the signal, and the signal held in the bandwidth is not attenuated until the output terminal 4 At the same time, the signal outside the bandwidth is attenuated as much as possible to stabilize the signal source outputted by the RF amplifier. At the same time, the signal current of the coupling circuit 12 passes through the electromagnetic induction effect, so that the directional coupling circuit 21 generates a signal. Inductive current, which passes through the voltage input column 223 and generates a DC input voltage value V1 through the filtering and rectifying action, and the current passes through the voltage output column 224 to generate a DC output voltage value through filtering and rectification. V2, and then the micro control module 5 performs the comparison comparison. If the DC voltage value V1 and the DC voltage value V2 are equal, it means that the load impedance and its output impedance are completely matched, and the output power of the RF amplifier is The maximum output power, if the values are not equal, it means that the load impedance does not match its output impedance. In this case, you can directly adjust or turn off the RF. Amplifier, in order to avoid direct burn violations occur.

Please refer to the fourth figure, which is a block diagram of the present invention, and the foregoing operation method is briefly described in a block flow. A filter module 1 and a power detection module 2 are provided, and a signal current is input through the filter module 1 for filtering (S1), and the signal current passes through the filter module 1 and the power detection module 2 The coupled inductor generates an induced current (S2) that generates an input voltage value V1 and an output voltage value V2 (S3) via the filtering and rectifying action in the power detecting module 2, and compares the input voltage value V1 with The voltage value V2 is output to determine whether its load impedance and its output impedance are completely matched (S4).

However, the embodiments described above are preferred embodiments, and the scope of the invention is not limited thereto, and equivalent changes or modifications made in accordance with the scope of the invention and the contents of the specification should be The scope of patent coverage.

1‧‧‧Filter module

11‧‧‧Filter circuit

12‧‧‧ Directional coupling circuit

2‧‧‧Power detection module

21‧‧‧ Directional coupling circuit

22‧‧‧Detection circuit

221‧‧‧Filter unit

222‧‧‧Rectifier unit

223‧‧‧Voltage input column

224‧‧‧Voltage output column

3‧‧‧ input

4‧‧‧ Output

5‧‧‧Micro Control Module

V1, V2‧‧‧ DC voltage value

The first figure is a block diagram of a conventional structure.

The second figure is a block diagram of the structure of the present invention.

The third figure is a schematic diagram of the operation of the present invention.

The fourth figure is a block flow chart of the present invention.

1‧‧‧Filter module

11‧‧‧Filter circuit

12‧‧‧ Directional coupling circuit

2‧‧‧Power detection module

21‧‧‧ Directional coupling circuit

22‧‧‧Detection circuit

221‧‧‧Filter unit

222‧‧‧Rectifier unit

223‧‧‧Voltage input column

224‧‧‧Voltage output column

3‧‧‧ input

4‧‧‧ Output

5‧‧‧Micro Control Module

Claims (9)

A filter detection device includes: a filter module electrically connected to an input end and an output end for receiving a signal current, the filter module further comprising: a directional coupling circuit, and the input end And the output end is electrically connected to receive the signal current; a filter circuit is electrically connected to the directional coupling circuit for interpreting the signal current input by the directional coupling circuit and filtering; a power detection module, And the filter module is electrically connected by coupling induction, the power detection module further comprises: a directional coupling circuit, which is coupled with the directional coupling circuit of the filter module to form an electrical connection; a detection circuit, The circuit is electrically connected to the directional coupling circuit, and the detection circuit is composed of a plurality of filtering units and a rectifying unit, and the filtering unit and the rectifying unit form a voltage input column and a voltage output column, thereby performing load of the signal current. Whether the situation is an exact match. The filter detecting device of claim 1, wherein the voltage input column and the voltage output column of the detecting circuit are electrically connected to a micro control module. The filter detection device of claim 1, wherein the voltage input column and the voltage output column are respectively serially connected by a filtering unit, a rectifying unit and a filtering unit. The filter detecting device according to claim 1, wherein the filter circuit is any one of a low pass filter circuit, a high pass filter circuit or a band pass filter circuit. The filter detecting device of claim 1, wherein the directional coupling circuits are composed of at least one microstrip line and at least one inductive component. The filter detecting device of claim 1, wherein the directional coupling circuits are electrically connected in any one of a horizontal coupling or a vertical coupling sensing manner. The filter detecting device according to claim 1, wherein the rectifying unit is composed of a plurality of diodes. A filtering detection method includes: 1) providing a filtering module and a power detecting module, and inputting a signal current through the filtering module for filtering; 2) the signal current passing through the filtering module and the power The detection module is coupled to generate an induced current; 3) the induced current generates an input voltage value V1 and an output voltage value V2 through filtering and rectifying in the power detecting module; 4) comparing the input voltage value V1 and The voltage value V2 is output to determine if its load impedance exactly matches its output impedance. The filtering detection method according to claim 1, wherein the step 2 is The coupling induction method is either a horizontal coupling or a vertical coupling sensing method.