JP2015119094A - Electromagnetic shield door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen a band of electromagnetic shield characteristics and to downsize a resonance structure loading dielectric body with respect to a travelling direction of an electromagnetic wave.SOLUTION: An electromagnetic shield door includes: a conductive door frame 2; a conductive door 1 arranged in a door frame; and a resonance structure loading dielectric body 3 which is provided for one or both opposite surfaces of the door 1 and the door frame 2 that face each other when the door 1 is closed over the whole periphery and resonates at a specific frequency. The resonance structure loading dielectric body 3 is provided with: a conductor surface 31 electrically connected to the door 1 and/or the door frame 2 provided with the resonance structure loading dielectric body 3; a plurality of conductor patterns 32a to 32h which are provided on the surface and are arranged in the width direction; a plurality of conductor patterns 33a to 33h which are provided inside and are arranged in the width direction; and through hole arrays 34a to 34d which electrically connect the conductor patterns 32a to 32h, 33a to 33h, and the conductor surface 31.

Description

  The present invention relates to an electromagnetic shield door used for preventing leakage and intrusion of electromagnetic waves at the entrance and exit of a shield room.

The structural example of the conventional electromagnetic shielding door is shown to FIGS. FIG. 14 is an enlarged view of an XY cross section passing through a broken line AA ′ in FIG.
As shown in FIGS. 13 and 14, the electromagnetic shield door includes a door 101, a door frame 102, a resonant structure loading dielectric 103, a hinge 104, and an opening / closing lever 105. The door 101 and the door frame 102 are conductive, and are connected via a hinge 104 and have a structure that can be opened and closed by operating the opening / closing lever 105. The resonant structure loaded dielectric 103 has a resonant structure and is disposed on the wall surface of the door 101 on the facing surface of the door 101 and the door frame 102.

Next, the resonance structure of the resonance structure loaded dielectric 103 will be described with reference to FIGS. 15 shows an enlarged view of a portion surrounded by a broken line B-C-D-E of the resonant structure loaded dielectric 103 in FIG. 14, and FIG. 16 shows a top view of FIG.
As shown in FIGS. 15 and 16, the resonant structure loaded dielectric 103 is provided with a conductor surface 1031 electrically connected to the door 101. The size of the YZ plane of the conductor surface 1031 is the same as that of the resonant structure loaded dielectric 103.

  The resonant structure loaded dielectric 103 is provided with conductor patterns 1032a to 1032h on the surface opposite to the surface to which the door 101 is attached. The conductor patterns 1032a to 1032h are band-shaped metal conductors having a constant width direction (Y direction) size and arranged along the circumferential direction of the door 1. The Y-direction dimensions of the conductor patterns 1032a to 1032h are La to Lh, respectively.

  The resonant structure loaded dielectric 103 is provided with through-through hole rows 1033a to 1033d therein. The through-through hole rows 1033a to 1033d are metal conductors arranged on the row along the Z-axis direction that is the circumferential direction of the door 1. Here, the through-through hole row 1033a electrically connects the conductor patterns 1032a and 1032b and the conductor surface 1031. Similarly, the through-through hole row 1033b electrically connects the conductor patterns 1032c and 1032d and the conductor surface 1031. Further, the through-through hole row 1033c electrically connects the conductor patterns 1032e and 1032f and the conductor surface 1031. Further, the through-through hole row 1033d electrically connects the conductor patterns 1032g and 1032h and the conductor surface 1031.

Next, the operation of the conventional electromagnetic shield door will be described. It is assumed that the Y-direction dimensions Lb to Lg of the conductor patterns 1032b to 1032g have a relationship of Lb = Lc, Ld = Le, and Lf = Lg.
The Y-direction dimensions Lb and Lc of the conductor patterns 1032b and 1032c are a quarter wavelength inside the resonant structure loaded dielectric 3 at the frequency fa. In addition, one end of the conductor patterns 1032b and 1032c in the Y direction is an open end, and the other end is connected to the through-through hole rows 1033a and 1033b. Thereby, the conductor patterns 1032b and 1032c operate as a one-end short-circuited resonator that resonates at the frequency fa.
Similarly, the conductor patterns 1032d and 1032e operate as single-end short-circuit resonators that resonate at the frequency fb, and the conductor patterns 1032f and 1032g operate as single-end short-circuit resonators that resonate at the frequency fc.

Here, consider a case where an electromagnetic wave having a frequency fa propagates in the Y direction through the gap between the door 1 and the door frame 2. In this case, the inside of the resonant structure loaded dielectric 3 surrounded by the conductor patterns 1032b and 1032c, the through-through hole rows 1033a and 1033b, and the conductor surface 1031 resonates and is electromagnetically coupled to the electromagnetic wave having the frequency fa. As a result, the electromagnetic wave having the frequency fa propagating in the Y direction through the gap between the door 1 and the door frame 2 is attenuated.
Similarly, when an electromagnetic wave having a frequency fb propagates in the Y direction through the gap between the door 1 and the door frame 2, the resonance structure is surrounded by the conductor patterns 1032d and 1032e, the through-through hole rows 1033b and 1033c, and the conductor surface 1031. The inside of the loaded dielectric 3 resonates and is electromagnetically coupled to the electromagnetic wave having the frequency fb. As a result, the electromagnetic wave having the frequency fb propagating in the Y direction through the gap between the door 1 and the door frame 2 is attenuated.
Similarly, when the electromagnetic wave having the frequency fc propagates in the Y direction through the gap between the door 1 and the door frame 2, the resonance structure is surrounded by the conductor patterns 1032f and 1032g, the through-through hole rows 1033c and 1033d, and the conductor surface 1031. The inside of the loaded dielectric 3 resonates and is electromagnetically coupled to the electromagnetic wave having the frequency fc. As a result, the electromagnetic wave having the frequency fc propagating in the Y direction through the gap between the door 1 and the door frame 2 is attenuated.
As a result, at frequencies fa to fc, leakage and penetration of electromagnetic waves in the gap between the door 1 and the door frame 2 can be prevented, and electromagnetic shielding characteristics at those frequencies can be obtained.

JP 2012-216757 A

As described above, in the conventional electromagnetic shield door, the resonant structure loaded dielectric 103 having a plurality of resonant structures that resonate at a specific frequency is attached to at least one of the conductive door 101 and the conductive door frame 102. doing. This resonant structure includes a conductor surface 1031, conductor patterns 1032 a to 1032 h disposed on the surface of the resonant structure loaded dielectric 103, and through-through holes 1033 a to 1033 d that connect the conductor patterns 1032 a to 1032 h and the conductor surface 1031. Composed. Thereby, in the state which closed the door 101, the electromagnetic shielding characteristic is realizable in the frequency which a resonance structure resonates, without the door 101 and the door frame 102 contacting.
However, since the conventional resonant structure loaded dielectric 103 is formed by arranging a plurality of resonant structures in the direction of electromagnetic wave travel, the electromagnetic shield characteristics are widened and the resonant structure loaded dielectric 103 is reduced in size in the direction of electromagnetic wave travel. There was a problem that it was difficult.

  The present invention has been made to solve the above-described problems, and provides an electromagnetic shield door capable of achieving a wide band of electromagnetic shield characteristics and a reduction in size of a resonant structure loaded dielectric in the electromagnetic wave traveling direction. It is an object.

  The electromagnetic shield door according to the present invention includes a conductive door frame, a conductive door arranged on the door frame, and one of the facing surfaces of the door and the door frame facing each other when the door is closed or And a resonant structure loaded dielectric that resonates at a specific frequency. The resonant structure loaded dielectric is electrically connected to a door or / and a door frame provided with the resonant structure loaded dielectric. Conductor surfaces, a plurality of first conductor patterns provided on the surface and arranged in the width direction, a plurality of second conductor patterns provided inside and arranged in the width direction, and first and second conductor patterns And a connection structure for electrically connecting the conductor surface.

  According to the present invention, since it is configured as described above, it is possible to widen the electromagnetic shield characteristics and to reduce the size of the resonant structure loaded dielectric in the electromagnetic wave traveling direction.

It is a figure which shows the structure of the electromagnetic shielding door which concerns on Embodiment 1 of this invention. It is A-A 'sectional drawing shown in FIG. FIG. 3 is an enlarged view of a portion surrounded by a broken line B-C-D-E shown in FIG. 2. FIG. 4 is a top view of FIG. 3. It is sectional drawing which showed a part of resonant structure loading dielectric material enclosed with the conductor pattern, through-through-hole row | line | column, and conductor surface in Embodiment 1 of this invention. It is the calculation result which carried out the electromagnetic field analysis of the transmission coefficient of the structure shown in FIG. It is a figure which shows the permeation | transmission coefficient of the electromagnetic wave which propagates the clearance gap between the door and door frame in Embodiment 1 of this invention to a Y direction. It is A-A 'sectional drawing shown in FIG. It is an enlarged view of the part enclosed by the broken-line part B-C-D-E shown in FIG. It is sectional drawing which showed a part of resonant structure loading dielectric material enclosed with the conductor pattern, through-hole row | line | column, and conductor surface in Embodiment 2 of this invention. It is the calculation result which carried out the electromagnetic field analysis of the transmission coefficient of the structure shown in FIG. It is a figure which shows the permeation | transmission coefficient of the electromagnetic wave which propagates the clearance gap between the door and door frame in Embodiment 2 of this invention to a Y direction. It is a figure which shows the structure of the conventional electromagnetic shielding door. It is A-A 'sectional drawing shown in FIG. It is an enlarged view of the part enclosed by the broken-line part B-C-D-E shown in FIG. FIG. 16 is a top view of FIG. 15.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
The electromagnetic shielding door which concerns on Embodiment 1 of this invention is demonstrated using FIGS. 2 is an enlarged view of an XY cross section passing through a broken line AA ′ in FIG.
As shown in FIGS. 1 and 2, the electromagnetic shield door includes a door 1, a door frame 2, a resonant structure loading dielectric 3, a hinge 4, and an opening / closing lever 5.

The door 1 is a plate member made of a conductive material and disposed on the door frame 2.
The door frame 2 is a frame that is made of a conductive material and that houses the door 1 when the door 1 is closed. The inner dimension of the door frame 2 is larger than the outer dimension of the door 1, and the inner peripheral surface of the door frame 2 faces the outer peripheral surface of the door 1 when the door 1 is closed.

  The resonant structure loaded dielectric 3 is a substrate that is provided over the entire circumference on the outer peripheral surface of the door 1 that faces the door 1 when the door 1 is closed, and resonates at a specific frequency. The resonant structure loaded dielectric 3 is for realizing electromagnetic shielding characteristics at a specific frequency at which the resonant structure resonates in a state where the door 1 is closed.

The hinge 4 is a mechanism for the door frame 2 to hold the door 1.
The opening / closing lever 5 is a mechanism operated to open / close the door 1.

Next, the resonance structure of the resonance structure loaded dielectric 3 will be described with reference to FIGS. 3 is an enlarged view of the broken line portion indicated by B-C-D-E of the resonant structure loaded dielectric in FIG. 2, and FIG. 4 is a top view of FIG.
As shown in FIGS. 3 and 4, the resonant structure loaded dielectric 3 is provided with a conductor surface 31 electrically connected to the door 1. The size of the YZ plane of the conductor surface 31 is the same as that of the resonant structure loaded dielectric 3.

  The resonant structure loaded dielectric 3 is provided with conductor patterns (first conductor patterns) 32a to 32h on the surface opposite to the surface to be applied to the door 1, and a conductor pattern (second conductor pattern) inside. ) 33a to 33h are provided. The conductor patterns 32 a to 32 h and 33 a to 33 h are strip-shaped metal conductors having a constant width direction (Y direction) size and arranged in a plurality along the circumferential direction of the door 1. The Y-direction dimensions of the conductor patterns 32a to 32h are La to Lh, respectively. Similarly, the Y-direction dimensions of the conductor patterns 33a to 33h are La to Lh, respectively. In the first embodiment, it is assumed that the dimensions in the Y direction have a relationship of Lb = Lc, Ld = Le, and Lf = Lg.

  Further, the Y-direction slit width between the conductor pattern 32b and the conductor pattern 32c is Sa, the Y-direction slit width between the conductor pattern 32d and the conductor pattern 32e is Sb, and the Y-direction slit width between the conductor pattern 32f and the conductor pattern 32g. Is Sc. Similarly, the Y-direction slit width between the conductor pattern 33b and the conductor pattern 33c is Sa, the Y-direction slit width between the conductor pattern 33d and the conductor pattern 33e is Sb, and the Y-direction slit between the conductor pattern 33f and the conductor pattern 33g. The width is Sc.

  The resonant structure loaded dielectric 3 is provided with through-through-hole rows (connection structures) 34a to 34d therein. The through-through hole rows 34 a to 34 d are metal conductors arranged on the row along the Z-axis direction that is the circumferential direction of the door 1. Here, the through-through hole row 34a electrically connects the conductor patterns 32a, 32b, 33a, 33b and the conductor surface 31. Similarly, the through-through hole row 34b electrically connects the conductor patterns 32c, 32d, 33c, 33d and the conductor surface 31. Further, the through-through hole row 34c electrically connects the conductor patterns 32e, 32f, 33e, 33f and the conductor surface 31. Further, the through-through hole row 34d electrically connects the conductor patterns 32g, 32h, 33g, 33h and the conductor surface 31.

Next, the operation of the electromagnetic shield door according to Embodiment 1 will be described.
First, an electromagnetic field analysis is performed on the resonant structure loaded dielectric 3 surrounded by the through-through hole rows 34a and 34b, the conductor patterns 32b, 32c, 33b, and 33c, and the conductor surface 31 in FIG. The result of calculating is shown in FIG.
As shown in FIG. 6, there are two frequencies at which the transmission coefficient is minimized, fa ′ = 1.3 GHz and fa ″ = 2.0 GHz. On the other hand, in the resonant structure loaded dielectric 103 surrounded by the through-hole arrays 1033a and 1033b, the conductor patterns 1032b and 1032c, and the conductor surface 1031 according to the prior art, the frequency at which the transmission coefficient is minimized is one of fa. is there. Therefore, it can be seen that the electromagnetic shield door according to the first embodiment can increase the frequency at which the transmission coefficient can be minimized, and can widen the frequency band for attenuating the transmission coefficient.

Similarly, an electromagnetic field analysis is performed on the resonant structure loaded dielectric 3 surrounded by the through-through hole rows 34b and 34c, the conductor patterns 32d, 32e, 33d, and 33e, and the conductor surface 31, and the transmission coefficient is calculated. Then, the frequency at which the transmission coefficient is minimized is two, fb ′ and fb ″.
Similarly, an electromagnetic field analysis is performed on the resonant structure loaded dielectric substrate surrounded by the through-through hole rows 34c and 34d, the conductor patterns 32f, 32g, 33f, and 33g, and the conductor surface 31, and the transmission coefficient is calculated. Then, the frequencies at which the transmission coefficient is minimized are fc ′ and fc ″.

  Therefore, when the electromagnetic wave propagates through the gap between the door 1 and the door frame 2 in the Y direction, the transmission coefficient becomes fa ′, fa ″, fb ′, fb ″, by the resonant structure loaded dielectric 3 shown in FIG. It becomes minimum at the six frequencies of fc ′ and fc ″.

  However, each frequency has a certain bandwidth in the attenuation band of the transmission coefficient. Therefore, it is possible to attenuate the electromagnetic wave in a frequency region around the resonance frequency. That is, in FIG. 7, the frequency interval Δf1 between the frequency fa ′ and the frequency fb ′, the frequency interval Δf2 between the frequency fb ′ and the frequency fa ″, the frequency interval Δf3 between the frequency fa ″ and the frequency fb ″, and the frequency fb ″. If the frequency interval Δf4 of the frequency fc ′ is widened, the frequency band in which the transmission coefficient is attenuated can be widened. Further, if the frequency intervals Δf1 to Δf4 are narrowed, the transmission coefficient can be reduced. Further, if the frequency intervals Δf1 to Δf4 of the resonance frequency are made uniform, the transmission coefficient becomes constant with respect to the frequency.

  In the conventional example shown in FIGS. 15 and 16, there are three resonance frequencies fa to fc, whereas in the first embodiment, the resonance frequencies are fa ′, fa ″, fb ′, fb ″, fc. The frequency band in which electromagnetic waves can be attenuated can be widened.

  By setting the dimension in the Y direction to Lb = Lc> Ld = Le> Lf = Lg, the resonance frequency becomes fa ′ <fb ′ <fc ′ and fa ″ <fb ″ <fc ″.

  In the above description, the case of Lb = Lc> Ld = Le> Lf = Lg has been described for ease of design. However, the present invention is not limited to this, and Lb ≠ Lc, Ld ≠ Le, and Lf ≠ Lg. Also good.

  Further, in the above, the resonant structure loading dielectric 3 is disposed on the outer peripheral surface of the door 1 in the gap between the door 1 and the door frame 2, but the resonant structure loading dielectric 3 is opposed to the door 1 and the door frame 2. You may arrange | position on the internal peripheral surface of the door frame 2 in a surface, or both the peripheral surfaces of the door 1 and the door frame 2. FIG. When the resonant structure loaded dielectric 3 is disposed on the inner peripheral surface of the door frame 2, the conductor surface 31 is electrically connected to the door frame 2. When the resonant structure loaded dielectric 3 is disposed on both peripheral surfaces of the door 1 and the door frame 2, the resonant structure loaded dielectric 3 is made to be in non-contact with each other.

  Moreover, although the case where the two layers of the conductor patterns 32a to 32h and 33a to 33h are provided on the resonant structure loaded dielectric 3 has been described above, the conductor pattern may be further added to have three or more layers.

  As described above, according to the first embodiment, the resonance structure loaded dielectric 3 is configured to be provided with the two or more layers of conductor patterns 32a to 32h and 33a to 33h. Therefore, it is possible to achieve a wide band of electromagnetic shielding characteristics and a reduction in size of the resonant structure loaded dielectric 3 in the electromagnetic wave traveling direction.

Embodiment 2. FIG.
A resonant structure disposed in the resonant structure loaded dielectric 3 of the electromagnetic shield door according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 9 is an enlarged view of a broken line portion indicated by B-C-D-E of the resonant structure loaded dielectric 3 in FIG. Further, the electromagnetic shield door according to the second embodiment has the same configuration other than the resonant structure loading dielectric 3 in the electromagnetic shield door according to the first embodiment shown in FIG.

  As shown in FIGS. 8 and 9, the resonant structure loaded dielectric 3 is provided with a conductor surface 31 electrically connected to the door 1. The size of the YZ plane of the conductor surface 31 is the same as that of the resonant structure loaded dielectric 3.

  The resonant structure loaded dielectric 3 is provided with conductor patterns (first conductor patterns) 35a to 35h on the surface opposite to the surface to be applied to the door 1, and a conductor pattern (second conductor pattern) inside. ) 36a to 36h are provided. The conductor patterns 35 a to 35 h and 36 a to 36 h are band-shaped metal conductors having a constant width direction (Y direction) size and arranged in a plurality along the circumferential direction of the door 1. The Y-direction dimensions of the conductor patterns 35a to 35h are La 'to Lh', respectively. On the other hand, the Y-direction dimension of the conductor pattern 36a is Li ′, the Y-direction dimension of the conductor pattern 36b is Lj ′, the sum of the Y-direction dimensions of the conductor pattern 36c and the conductor pattern 36d is Lk ′, and the conductor pattern 36e. The Y-direction dimension is Ll ′, the Y-direction dimension of the conductor pattern 36f is Lm ′, and the total Y-direction dimension of the conductor pattern 36g and the conductor pattern 36h is Ln ′. In the second embodiment, it is assumed that the dimension in the Y direction has a relationship of L1 ′ + Lm ′> Lj ′ + Lk ′> Ld ′ + Le ′> Lf ′ + Lg ′> Lb ′ + Lc ′.

  The Y-direction slit width between the conductor patterns 35b and 35c is Sa ', the Y-direction slit width between the conductor patterns 35d and 35e is Sb', and the Y-direction between the conductor patterns 35f and 35g. The slit width is Sc ′. The Y-direction slit width between the conductor pattern 36b and the conductor pattern 36c is Sd ', and the Y-direction slit width between the conductor pattern 36e and the conductor pattern 36f is Se'.

  The resonant structure loaded dielectric 3 is provided with through-hole rows (connection structures) 37a to 37f therein. The through-hole rows 37 a to 37 f are metal conductors arranged on the row along the Z-axis direction that is the circumferential direction of the door 1. The through hole row 37a is a through hole, and the through hole rows 37b to 37f are blind via holes. Here, the through-hole row 37a electrically connects the conductor patterns 35a, 35b, 36a, 36b and the conductor surface 31. Further, the through-hole row 37b electrically connects the conductor patterns 35c, 35d, 36c, and 36d. Further, the through-hole row 37c electrically connects the conductor patterns 36c to 36e and the conductor surface 31. The through-through hole row 37d electrically connects the conductor patterns 35e, 35f, and 36e. The through-hole row 37e electrically connects the conductor patterns 36f and 36g and the conductor surface 31. The through-through hole row 37f electrically connects the conductor patterns 35g, 35h, 36g, and 36h.

Next, the operation of the electromagnetic shield door according to the second embodiment will be described.
First, an electromagnetic field analysis is performed on the resonant structure loaded dielectric 3 surrounded by the through-hole rows 37a to 37c, the conductor patterns 35b, 35c, 36b to 36d, and the conductor surface 31 in FIG. The calculated results are shown in FIG.
As shown in FIG. 11, there are two frequencies at which the transmission coefficient is minimized, fa ′ = 1.3 GHz and fa ″ = 3.7 GHz. On the other hand, in the resonant structure loaded dielectric 103 surrounded by the through-hole arrays 1033a and 1033b, the conductor patterns 1032b and 1032c, and the conductor surface 1031 according to the prior art, the frequency at which the transmission coefficient is minimized is one of fa. is there. Therefore, it can be seen that the electromagnetic shield door according to the second embodiment can increase the frequency at which the transmission coefficient can be minimized, and can widen the frequency band for attenuating the transmission coefficient.

  Compared with FIG. 6 which is the calculation result of FIG. 5 shown in the first embodiment, the resonance frequency fa ′ on the low frequency side is not changed to 1.3 GHz, but the transmission coefficient is reduced from −27 dB to −35 dB. ing. Further, the resonance frequency fa ″ on the high frequency side is shifted from 2.0 GHz to 3.7 GHz to the high frequency side, and the transmission coefficient is decreased from −20 dB to −30 dB. Therefore, it is considered that the electromagnetic shield door according to the second embodiment can make the transmission coefficient smaller and broaden the bandwidth.

Similarly, the electromagnetic field analysis is performed on the resonant structure loaded dielectric 3 surrounded by the through-hole rows 37c to 37f, the conductor patterns 35f, 35g, 36e to 36g, and the conductor surface 31, and the transmission coefficient is calculated. The frequencies at which the transmission coefficient is minimized are fb ′ and fb ″.
Similarly, the electromagnetic field analysis is performed on the resonant structure loaded dielectric 3 surrounded by the through-hole rows 37b and 37d, the conductor patterns 35d, 35e, 36d, and 36e and the conductor surface 31, and the transmission coefficient is calculated. The frequency at which the transmission coefficient is minimum is one of fc ′.

  Therefore, when the electromagnetic wave propagates in the gap between the door 1 and the door frame 2 in the Y direction, the transmission coefficient is fa ′, fa ″, fb ′, fb ″, by the resonant structure loaded dielectric 3 shown in FIG. It becomes minimum at five frequencies of fc ′.

  However, each frequency has a certain bandwidth in the attenuation band of the transmission coefficient. Therefore, it is possible to attenuate the electromagnetic wave in a frequency region around the resonance frequency. That is, in FIG. 12, the frequency interval Δf1 between the frequency fb ′ and the frequency fa ′, the frequency interval Δf2 between the frequency fa ′ and the frequency fc ′, the frequency interval Δf3 between the frequency fc ′ and the frequency fb ″, the frequency fb ″ and the frequency fa. When the frequency interval Δf4 of '' is widened, the frequency band in which the transmission coefficient is attenuated can be widened. Further, if the frequency intervals Δf1 to Δf4 are narrowed, the transmission coefficient can be reduced. Further, if the frequency intervals Δf1 to Δf4 of the resonance frequency are made uniform, the transmission coefficient becomes constant with respect to the frequency.

  In the configuration of the second embodiment, the number of resonance frequencies is reduced from six to five as compared with the configuration of the first embodiment. However, in the first embodiment, the intervals between the resonance frequency fc ′ and the resonance frequency fc ″ are difficult to coincide with Δf1, Δf2, Δf3, Δf4 shown in FIG. 7, whereas in the second embodiment, Δf1 ′, Δf2 It is easy to design ', Δf3', and Δf4 'at equal intervals. Moreover, when FIG. 6 which is the calculation result of the electromagnetic field analysis of Embodiment 1 is compared with FIG. 11 which is the calculation result of the electromagnetic field analysis of Embodiment 2, the transmission coefficient is smaller in FIG. It turns out that it is easy to attenuate electromagnetic waves.

  In the above description, the dimension in the Y direction has been described as having a relationship of Ll ′ + Lm ′> Lj ′ + Lk ′> Ld ′ + Le ′> Lf ′ + Lg ′> Lb ′ + Lc ′, but this relationship may not be satisfied. Absent. However, the transmission coefficient can be reduced by satisfying Ll ′ + Lm ′> Lf ′ + Lg ′ and Lj ′ + Lk ′> Lb ′ + Lc ′.

  Further, in the above, the resonant structure loading dielectric 3 is disposed on the outer peripheral surface of the door 1 in the gap between the door 1 and the door frame 2, but the resonant structure loading dielectric 3 is opposed to the door 1 and the door frame 2. You may arrange | position on the internal peripheral surface of the door frame 2 in a surface, or both the peripheral surfaces of the door 1 and the door frame 2. FIG. When the resonant structure loaded dielectric 3 is disposed on the inner peripheral surface of the door frame 2, the conductor surface 31 electrically connects the door frame 2. When the resonant structure loaded dielectric 3 is disposed on both peripheral surfaces of the door 1 and the door frame 2, the resonant structure loaded dielectric 3 is made to be in non-contact with each other.

  In the above description, the case where two layers of conductor patterns 35a to 35h and 36a to 36h are provided on the resonant structure loaded dielectric 3 has been described. However, a conductor pattern may be further added to have three or more layers.

  As described above, according to the second embodiment, the positions of the conductor patterns 35a to 35h and 36a to 36h are changed to electrically connect the conductor patterns 35a to 35h and the conductor patterns 36a to 36h, Since the through-hole rows 37a to 37f for connecting the conductor patterns 36a to 36h and the conductor surface 31 so as to be different from each other are provided, the transmission coefficient is larger than that of the first embodiment. Can be reduced, and electromagnetic waves can be easily attenuated.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  1 Door, 2 Door Frame, 3 Resonant Structure Loading Dielectric, 4 Hinge, 5 Open / Close Lever, 31 Conductor Surface, 32a to 32h, 35a to 35h Conductor Pattern (First Conductor Pattern), 33a to 33h, 36a to 36h Conductor Pattern (second conductor pattern), 34a to 34d through-hole array (connection structure), 37a to 37f through-hole array (connection structure).

Claims (3)

A conductive door frame;
A conductive door disposed on the door frame;
Resonating structure loading dielectric that is provided over the entire circumference on one or both of the facing surfaces of the door and the door frame facing when the door is closed, and resonates at a specific frequency,
The resonant structure loaded dielectric is:
A conductor surface electrically connected to the door or / and the door frame provided with the resonant structure loading dielectric;
A first conductor pattern provided on the surface and arranged in the width direction;
A second conductor pattern provided inside and arranged in the width direction;
An electromagnetic shield door comprising a connection structure for electrically connecting the first and second conductor patterns and the conductor surface. Each of the first conductor patterns has a different width,
Each of the second conductor patterns has a different width,
In the connection structure, a position where the first conductor pattern and the second conductor pattern are electrically connected is different from a position where the second conductor pattern and the conductor surface are electrically connected. The electromagnetic shield door according to claim 1. The electromagnetic shielding door according to claim 1, wherein the second conductor pattern is laminated in two or more layers.

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