JPH11136023A - Micro strip antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which is a changing device of a resonance frequency of a micro strip antenna, drastically changes the dielectric constant of a dielectric substrate on which a radiation element is mounted and accordingly drastically changes the resonance frequency. SOLUTION: This antenna consists of a radiation element 1 that is an entrance and an exit, a dielectric casing 2 which has a dielectric substrate on which the element 1 is mounted as a top plate and forms sheath body into which a dielectric constant adjustment board 5 can be inserted, a ground conductor plate 3 that is provided on the bottom of the casing 2 and four pole braces 4 which forms the sheath body. Here, the board 5 which is inserted into the casing 2 is a dielectric board that is preliminary adjusted and set so that the resonance frequency of the element 1 may be a required value and a desired resonance frequency can be given to the element 1 only by inserting the board 5 into the casing 2 when it is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a microstrip antenna, and more particularly, to a microstrip capable of changing a resonance frequency.

[0002]

2. Description of the Related Art Conventionally, this type of microstrip antenna has been disclosed in, for example,
As disclosed in JP-A No. 15283 and JP-A-5-145328, holes are formed in a dielectric substrate sandwiched between a radiating element and a ground conductor plate to reduce the effective dielectric constant of the dielectric substrate, or The resonance frequency is raised or lowered by filling the hole with another dielectric to increase the effective permittivity.

[0003]

In the above-mentioned conventional microstrip antenna, since the effective dielectric constant is changed by forming a hole in the dielectric, the rate of change of the effective dielectric constant is small, and the resonance frequency can be finely adjusted. There was a problem that it was possible.

An object of the present invention is to provide a microstrip antenna whose resonance frequency can be changed over a wide range.

[0005]

SUMMARY OF THE INVENTION A microstrip antenna according to the present invention comprises: a radiating element serving as a radio wave input / output port; a dielectric substrate on which the radiating element is mounted; a ground conductor plate made of metal; A dielectric casing in which a dielectric constant adjustment plate for resonance frequency adjustment is mounted between the dielectric substrate and the ground conductor plate, and has a device in which the dielectric constant adjustment plate can be automatically selected and mounted by key input. .

[0006]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the microstrip mantener of the present invention.

In this microstrip antenna, a radiating element 1, which is an antenna serving as an entrance and exit of a radio wave, a dielectric casing 2 for mounting a dielectric constant adjusting plate, a ground conductor plate 3 for ground connection, and a required resonance frequency And a dielectric constant adjusting plate 5 inserted into the dielectric casing to generate the electric field.

The dielectric casing 2 has columns 4 at four corners, and a dielectric substrate on which a radiating element is mounted, in order to maintain the structure of the dielectric constant adjusting plate 5 as a sheath.
A ground conductor plate 3 is provided on the bottom surface.

The operation of the microstrip antenna according to the present invention will be described. When a dielectric constant adjusting plate 5 for giving a required resonance frequency measured and adjusted and set in advance to the radiating element is inserted into the dielectric casing 2, the radiating element 1 changes its resonance frequency to transmit and receive the corresponding resonance frequency. Make it possible.

[0011]

FIG. 2 is a block diagram showing an embodiment of a microstrip antenna according to the present invention.

The microstrip antenna includes an input unit 11 for instructing mounting of a required permittivity adjusting plate, and a control unit 1.
2, a microstrip antenna main body 10, a dielectric constant adjusting plate magazine 16 in which a dielectric constant adjusting plate is stored, and a detecting unit 13 for detecting the presence or absence of a dielectric constant adjusting plate remaining inside the dielectric casing 2. The storage unit 14 for extracting the remaining dielectric constant adjusting plate, reading out the identification code, and storing it in the dielectric constant adjusting plate magazine 16, and taking out the designated dielectric constant adjusting plate from the dielectric constant adjusting plate magazine and removing the dielectric casing. And a mounting portion 15 to be inserted and mounted in the device.

The detecting unit 13 is a storage position reader (not shown) for reading out the storage destination of the permittivity adjusting plate 5 by an identification symbol.
The mounting unit 15 has a position search function for searching for a position in the dielectric constant adjusting plate magazine where the corresponding dielectric constant adjusting plate is to be stored when the input specifies the resonance frequency.

The function of attaching and detaching the guiding rate adjusting plate 5 is used for the storage section 14 and the mounting section 15, but as shown in FIG. A revolving arm 18 capable of vertically moving with a level and an angular position being set at each storage position of the magazine, and a reciprocating arm 18 capable of holding and pulling out and inserting the dielectric constant adjusting plate 5 on the turntable; has a cylinder 19 to expand and contract the reciprocating Doude 18, and a vertical movement Sabomota 20 ₁ rotation servo motor 20 ₂ for positioning the turntable to the position set.

[0015]

As described above, in the microstrip antenna of the present invention, by changing the dielectric substrate by inserting a dielectric constant adjusting plate so as to have a different dielectric constant, the resonance is maintained while the radiating element is fixed. There is an effect that the frequency can be changed.

Further, since the dielectric constant of the dielectric constant adjusting plate can be largely changed, the effect of increasing the change width of the resonance frequency is particularly noteworthy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a typical configuration for describing an embodiment of a microstrip antenna of the present invention.

FIG. 2 is a block diagram of one embodiment of automatic mounting of a microstrip antenna of the present invention by remote input.

3A illustrates a storage unit 14 and a mounting unit 15 illustrated in FIG.
FIG. 4B is a plan view of the turntable 17 to be driven, and FIG.

[Explanation of millionaires]

REFERENCE SIGNS LIST 1 radiating element 2 dielectric casing 3 ground conductor plate 4 support column 5 dielectric constant adjusting plate 10 microstrip antenna 12 control unit 13 detecting unit 14 storage unit 15 mounting unit 16, 16 ₁ , 16 ₂ dielectric constant adjusting plate magazine 17 turntable 18 reciprocating Doude 19 cylinder 20 _1, 20 ₂ servomotors

Claims (7)

[Claims] 1. A microstrip antenna capable of replacing a dielectric substrate with a different dielectric constant. 2. A dielectric casing having a sheath for detachably accommodating a dielectric constant adjusting plate is provided between a dielectric substrate on which a radiating element is mounted and a ground conductor, and inserted and removed from the dielectric casing. 2. The microstrip antenna according to claim 1, further comprising: a dielectric constant adjusting plate that allows the radiating element to have a required resonance frequency, which is detachable by the method, and wherein the specified dielectric constant adjusting plate is selectively mounted. 3. The microstrip antenna according to claim 2, further comprising means for automatically performing selective attachment and detachment of said permittivity adjusting plate in accordance with an input instruction by remote keying. 4. A means for automatically mounting the inductivity adjusting board automatically by the input, wherein the means is adjusted and set in advance so that the radiating element has a predetermined resonance frequency, and is provided with an identification symbol. A guide ratio adjustment board magazine in which various types of guide ratio adjustment boards are stored; a means for detecting the presence or absence of another guide rate adjustment board in the derivative casing when the replacement of the derivative board is instructed; When the induction ratio adjustment board is mounted, remove the mounted induction ratio adjustment board,
Means for storing the guide rate adjustment board in the storage position; means for selectively extracting the specified guide rate adjustment board from the guide rate adjustment board magazine; and extracting the specified guide rate adjustment board to the dielectric casing. 4. The microstrip antenna according to claim 3, further comprising means for mounting. 5. The microstrip antenna according to claim 4, wherein the identification symbol of the guide ratio adjustment board is a storage position display symbol of the guide ratio adjustment board magazine. 6. A means for identifying a corresponding position of a dielectric constant adjusting plate magazine when inputting at a resonance frequency, comprising a comparison table in which an identification symbol of the inductive ratio adjusting substrate is compared with a corresponding resonance frequency. The microstrip antenna according to claim 5, comprising: 7. The microstrip antenna according to claim 1, wherein the dielectric constant adjusting plate is a plate made of a dielectric material.