JPH01209384A - Wireless frequency power monitoring apparatus - Google Patents

Abstract

PURPOSE:To obtain a handy and accurate RF power monitoring circuit with a comparison of the apparatus, by making freely adjustable a probe for an RF input terminal of a detector containing a temperature compensation circuit to be inserted into a waveguide through a tiny hole. CONSTITUTION:A freely adjustable probe 2 for an RF input terminal is projected below one end of a hybrid IC detector 1 containing a temperature compensation circuit, a terminal 31 for a detection output below the other end thereof, and a plurality of terminals 32 for DC bias below the center thereof. Moreover, a waveguide 4 is provided with tiny holes 41, 42 and 43 so as to have these terminals inserting thereinto freely. The tiny hole 41 is made to communicate with a cavity 42. An RF power of the cavity 42 in the waveguide 4 is subjected to a coupling with the probe 2 for the RF input terminal of the detector 1 to obtain a detector input. This facilitates the setting of an RF input value for obtaining the optimum detection output with a compaction of the apparatus, thereby preventing variations in monitoring otherwise caused by temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio frequency (RF) monitoring device, and more particularly to a radio frequency power monitoring device for monitoring RF main power of a waveguide.

[Conventional technology]

Conventionally, this type of monitor device has been configured to use a waveguide coupler, as shown in FIGS. 2 and 3, in order to control the large RF input power to the wave detector.

In the case of the monitor device shown in Figure 2, the waveguide is shaped like a long rectangular pipe.
A somewhat elongated square pipe-shaped coupler 15 is attached to the lower center of l'14, and one end opening of the coupler 15 is connected to the terminator 1.
8, and the other end opening is closed by a detector 11. Note that a hole 12 is opened in the center of the top wall of the coupler 15, and 13 in the figure is a terminal for detection output and a terminal for DC bias.

The monitor device shown in FIG. 3 consists of a long rectangular pipe shaped waveguide 24.
A coupler 25 in the shape of a rectangular pipe with a slightly elongated shape is attached to one circumferential wall, and one end opening of the coupler 25 is connected to the terminator 2.
6, and the other end opening is closed by a detector 21. Note that a hole 22 is opened in the center of one circumferential wall of the coupler 25, and 23 in the figure is a terminal for detection output and a terminal for DC bias.

[Problem to be solved by the invention]

The conventional monitor device described above uses a waveguide-type coupler, and therefore has the disadvantage that it is difficult to make it compact.

[Means to solve the problem]

The monitor device of the present invention is a device for monitoring radio frequency power in a waveguide using a detector, and includes at least a probe disposed at a radio frequency input terminal of the detector, and a probe disposed at a terminal for radio frequency input of the detector, and a probe disposed at a terminal for radio frequency input of the detector; and a small hole into which the probe can be freely inserted.

[Effect]

Therefore, according to the present invention, by inserting the probe for the RFF power terminal of the detector into the waveguide through the small hole,
Since the input of the detector is obtained by coupling the RF main power of the waveguide, there is no need to use a waveguide type coupler, making it easy to downsize.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view and a sectional view schematically showing an embodiment according to the present invention. The flat plate oval detector 1 shown in the figure has a probe 2 for an RFF power terminal protruding from one end downward, and a detection output terminal 3 protruding from the other end downward.
A plurality of terminals 32 for DC bias are provided protrudingly below the center.

The detector 1 is a hybrid IC that incorporates a detection diode and the like (as shown in the diagram), as well as an appropriate temperature compensation circuit (as shown in the diagram).

4 is a thick plate-shaped waveguide, which has a small hole 41 into which the probe 2 can be inserted, a rectangular plate-shaped cavity 42 in a longitudinal horizontal direction that communicates with the small hole 41, and a group of terminals 3 □ inserted therein. A rectangular hole 43 in the shape of a vertical column that allows the terminal 31 to be inserted freely, and a round hole 44 in the shape of a column in the vertical direction that allows the terminal 31 to be inserted freely are formed.

In the above embodiment, the RF main power of the cavity 4□ of the waveguide 4 is RF coupled by the probe 2 for the RFF power terminal of the detector 1, and is input to the detector 1 through the built-in diode, etc. (as shown in the diagram). ) to obtain a detection output from the detection output terminal 3I.

Note that the RF coupling amount is adjusted by adjusting the shape of the RFF force terminal probe 2. For example, adjustment can be easily made by changing the length of the screw-type probe 2.

To summarize the above embodiment in another way, this embodiment uses a hybrid integrated circuit (HIC) detector including a detection diode, etc. in a circuit that monitors the RF main power of a waveguide using a detector. RF of the HIC
There is an RF power unit 5 circuit characterized by inserting an F power terminal probe into a waveguide and obtaining a detector input from its RF coupling.

(Effects of the Invention) As explained above, the present invention utilizes a detector that incorporates a detection diode and is made into a hybrid IC, and the RF
By inserting the F-force terminal probe into the waveguide, the RF main power of the waveguide is coupled and the detector power is obtained, so there is no need to use a waveguide type coupler, making it easier to downsize. Furthermore, for large RF inputs to the detector, the amount of RF coupling can be changed by adjusting the shape of the RFF force terminal probe, making it easy to adjust the RFF force value to obtain the optimal detection output. There are effects that can be set to .

In addition, use of a hybrid IC detector with a built-in temperature compensation circuit has the effect of eliminating fluctuations in monitor output due to temperature.

[Brief explanation of the drawing]

FIG. 1 is a plan view and a sectional view thereof showing an embodiment according to the present invention, and FIGS. 2 and 3 are, respectively,
FIG. 2 is a plan view showing a conventional example and a sectional view thereof. 1...Detector, 2...Probe, 3!・
32°°° terminal, 4... waveguide. Figure 3

Claims (1)

[Scope of Claims] 1) A device for monitoring radio frequency power in a waveguide using a detector, comprising at least a probe disposed at a terminal for radio frequency input of the detector, and a probe disposed in the waveguide. A radio frequency power monitoring device comprising: a small hole opened to allow the probe to be freely inserted. 2) The monitoring device according to claim 1, wherein the probe is adjustable. 3) The monitor device according to claim 1 or 2, wherein the detector has a built-in temperature compensation circuit.