JPS58178609A - Detector - Google Patents

Abstract

PURPOSE:To obtain a thin detector by forming a metallic film laminated on one side of a dielectric sheet and a circuit pattern on the other side respectively and fitting a detecting diode between the laminated metallic films. CONSTITUTION:Thin metallic films 1, 3 are laminated on both sides of the dielectric sheet 2 to form a base sheet A. The circuit pattern to be used as a detector is formed on the metallic film 3. In order to insulate the metallic film pattern 3 on one side of the base sheet A, a dielectric sheet B is adhered. A diode C to detect microwaves is fitted between the metallic films 1 and 3.

Description

[Detailed description of the invention] The present invention relates to a microwave detector.

Generally, a device used for detecting the presence or absence of a signal or monitoring a signal level in a micro waveguide circuit or larger is called a wave detector or a crystal mount. For conventional detectors.

There were several types. Typical types include a system that combines a directional coupler and a crystal mount, and a crystal mount system that has a coupler called a probe protruding into the waveguide. However, these conventional types of detectors have drawbacks such as being large in size and expensive due to their complicated configurations. In recent years, microwave communication devices are being used not only for large-capacity communication systems as in the past, but also for applications requiring small transmission capacity. This requires devices to be smaller and lower in price. This requirement extends to all devices and circuits, and detectors are no exception. Conventional wave detectors tend to have limitations in meeting such demands, and a new wave detector has been desired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new type I detector that eliminates the drawbacks of the conventional detectors described above.

According to the present invention, a flexible first dielectric sheet, a first metal foil laminated on one side of the first dielectric sheet, and a first metal foil laminated on one side of the first dielectric sheet; a second metal foil laminated with a circuit iP turn formed thereon that operates as a wave detector; a detection diode installed between the first and second metal foils; and the second metal foil. A detector having a second dielectric sheet covering the foil is obtained.

The detector of the present invention can be constructed extremely thin and is used by being inserted between flanges of a waveguide.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing the configuration of an embodiment of a detector according to the present invention, and FIG. 2 is a partially enlarged cross-sectional view of FIG. 1 as seen from the x-x' line. It is a diagram. The detector according to this embodiment is composed of three parts A, B, and C shown in FIG. Reference numeral A is a phosphor sheet in which thin metal foils 1 and 3 are laminated on both sides of a dielectric sheet 2 having a thickness of several tens of microns, and a circuit pattern that operates as a detector is formed on the metal foil 3 portion. B is a dielectric sheet pasted to insulate the metal foil turf 3 on one side of the base sheet A. C is a diode that functions to detect microwaves.

Usually a Schottky barrier diode is used.

Next, one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

10 acts as a low-frequency f-wave or band rejection filter.
This pattern is formed on the metal foil 3 of the base sheet A by a photo-etching process. 1
1 is used as an actance element, and placed in a waveguide together with a detection diode C to realize a detection function. At the same time, it also functions as a return circuit for microwave detection components (mainly DC components). The diode C is attached to the base sheet A by welding means such as soldering. 12 is the dielectric sheet 2 and metal foil 10 portions of base sheet A) folded back. As shown in FIG. 2, by folding back the metal foil 1 is exposed on the opposite side. Reference numeral 14 is a line for guiding the detected signal to another circuit, and reference numeral 15 is a pattern serving as a ground line. This lead-out portion is manufactured to a required length, and connection terminal portions 16 and 17 for connecting to other circuits are formed at the ends thereof. Various types of this contact hL method can be considered. For example, it may be in the form of a connector.

Next, a description will be given of how the detector described in the above embodiment is used in a microwave circuit.

FIG. 3 explains a method of mounting two wave detectors according to the present invention in a waveguide circuit. 21 is a pair of waveguides 7 run sandwiching the detector, D is the detector explained in the above embodiment,
20 is a thin metal plate.

The metal plate 20 is for making good contact with the outer conductor of the detector (metal foil 1 in Figure 2), and has a hole in the center with the same diameter as the waveguide, and a hole in the surface. is embossed (fine unevenness). The metal plate 20 is brought into contact with the left side of FIG. By doing so, it is possible to make contact with the folded outer conductor metal foil l and also to obtain good electrical contact with the waveguide flange 21. The detector is sandwiched between the waveguide 7 runno 21 together with the metal plate 20, and the bolt 22
said Natsuto 23 firmly. The implementation is now complete, and the detected signal can be extracted by connecting the terminals 16 and 17 to other circuits.

The detector of the present invention has been described above with reference to the embodiments.

It is extremely thin and requires little mounting space. The thickness of the dielectric sheet 2 can be explained using the cross-sectional view of FIG.
and B is 25-35 microns, metal? Similarly, it is convenient for F51 and F3 to be about 25 to 35 microns in terms of manufacturing. The total thickness is 0.15 to 0.2 te including the folded part.
It can be kept to about a. In FIG. 3, a metal plate 20 with an embossed surface is held together. This metal plate 20
This is to ensure good electrical contact, but it is not necessarily necessary, and the contact will be more stable if inserted. This metal plate 20 has a thickness of 50
It is on the order of microns, so the total thickness including the detector is 0.2 to 0.25 m.

Various modifications can be made to the detector of the present invention which has been described above using the embodiments. For example, the part that is fixed inside the waveguide (
The actance element (symbol 11 in FIG. 1) can have various shapes depending on the degree of coupling to the main line, 1 frequency response, etc.

Also, a low frequency wave or band rejection filter 10.

Various pattern shapes are possible.

As mentioned above, the detector of the present invention is extremely thin.

Substantially, the mounting space of the entire device is hardly increased. An increase in the axial dimension of about 0.2 degrees is absorbed within the range of normal mounting errors and variations.

Furthermore, since the detected signal is derived through an insulated flexible lead-out line that is integrated with the detector, implementation is very simple. Furthermore, the detector of the present invention is formed by photo-etching process similar to that of a printed wiring board, and the outer shape is punched out by press processing, making it extremely inexpensive. This contributes to lowering the cost of the device.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the configuration of one embodiment of the present invention;
This figure is a partially enlarged cross-sectional view of the part seen from the line x-x' in FIG. 1, and FIG. 3 is a diagram illustrating an implementation mode of the detector according to the present invention.

Claims (1)

[Claims] 1. A flexible first dielectric sheet, a first metal foil laminated on one side of the first dielectric sheet, and a detector on the other side of the first dielectric sheet. a second metal foil laminated with a circuit pattern formed thereon to operate as a detector, a detection diode installed between the first and second metal foils, and a second metal foil covering the second metal foil; A detector having a dielectric sheet.