JP2011182179A - High-frequency module housing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency module housing structure having a terminator loading antenna that can couple with and absorb high harmonic signals propagating in a space in a housing on a waveguide mode. <P>SOLUTION: A high-frequency module housing in which a microwave amplifier is arranged at an output stage, has an antenna, and a terminator. The antenna is arranged so as to enable it to couple with a high harmonic signal at a predetermined position on a ceiling surface of the high-frequency module housing corresponding to the vicinity of at least one of a plurality of electric field concentration points caused by a housing resonance of the high harmonic signal propagating in a space in the high-frequency module housing on a waveguide mode. The terminator is loaded on the antenna, and converts the energy of the high harmonic signals induced by the antenna into heat energy to absorb the energy. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a high-frequency module housing structure.

  Since microwave amplifiers generate harmonics other than the fundamental wave, a harmonic suppression circuit is placed on the output side of the microwave amplifier, and harmonics are not affected without affecting the characteristics such as high-power amplification at the fundamental wave. Can be suppressed.

  As a harmonic suppression circuit, a short stub that realizes a short circuit state or an open stub that realizes an open state is provided on the output side of the microwave amplifier to reflect the harmonic signal (for example, a patent) Document 1) and a configuration for reflecting a harmonic signal by providing a coupling line that resonates with the harmonic signal (for example, Patent Document 2) are known.

  However, even in a microwave amplifier to which a harmonic suppression circuit is added, when it is housed in a module housing, a harmonic signal exceeding the cutoff frequency of the module housing is radiated from the output end of the microwave amplifier to the space inside the housing. In this case, the harmonic signal propagates in the waveguide mode and is coupled to the connection portion with the module output connector, and there is a problem that the harmonic signal leaks to the outside through the module output connector. It was.

  In order to solve such a problem, Patent Document 3 proposes a high-frequency circuit package in which a plate-shaped radio wave absorber is fixed to an inner surface surrounding a space in a housing.

Japanese Patent Laid-Open No. 2001-53510 JP-A-8-139535 Japanese Patent No. 3110405

  However, sufficient attenuation characteristics cannot be obtained with the radio wave absorber. In addition, there is a problem that it cannot be used above the frequency limit value of the precession of the magnetic substance in the radio wave absorber.

  The present invention has been made in view of the above, and obtains a high-frequency module housing structure including a terminator-loaded antenna that can be coupled and absorbed by a harmonic signal propagating in a space in the housing in a waveguide mode. With the goal.

  In order to achieve the above-described object, a high-frequency module housing structure according to the present invention is a high-frequency module housing in which a microwave amplifier is disposed at an output stage, and propagates in a space in the high-frequency module housing in a waveguide mode. An antenna that is arranged at a predetermined position on the ceiling surface of the high-frequency module housing corresponding to the vicinity of at least one electric field concentration location of a plurality of electric field concentration locations due to casing resonance of the harmonic signal to be coupled, and is coupled to the harmonic signal And a terminator loaded on the antenna and converting the energy of the harmonic signal induced in the antenna into thermal energy and absorbing it.

  According to the present invention, the antenna provided on the ceiling surface of the high-frequency module housing couples with the harmonic signal propagating in the space in the module housing 1 in the waveguide mode to induce the energy of the harmonic signal, Since the terminated terminator converts the energy of the harmonic signal induced in the antenna into thermal energy and absorbs it, there is an effect that harmonic leakage to the outside can be suppressed.

FIG. 1 is a partial side cross-sectional view showing a main configuration of a high-frequency module housing structure according to an embodiment of the present invention. FIG. 2 is a conceptual diagram for explaining the first embodiment. FIG. 3 is a conceptual diagram illustrating the second embodiment. FIG. 4 is a conceptual diagram for explaining the third embodiment. FIG. 5 is a conceptual diagram for explaining the fourth embodiment. FIG. 6 is a conceptual diagram for explaining the fifth embodiment. FIG. 7 is a conceptual diagram for explaining the sixth embodiment. FIG. 8 is a conceptual diagram for explaining the seventh embodiment. FIG. 9 is a conceptual diagram for explaining the eighth embodiment. FIG. 10 is a conceptual diagram for explaining the ninth embodiment. FIG. 11 is a conceptual diagram for explaining the tenth embodiment.

  Hereinafter, embodiments of a high-frequency module housing structure according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a partial side cross-sectional view showing a main configuration of a high-frequency module housing structure according to an embodiment of the present invention. In FIG. 1, a module housing 1 includes a housing body 1a made of a metal bottomed box, and a cover 1b made of a metal plate that covers the opening of the housing body 1a. A metal carrier 2 is disposed on the floor surface of the housing body 1a.

  In the figure, the left side of the casing body 1a is the output, and the right side is the input side. A coaxial connector 3 is attached to the output side end of the housing body 1a. The coaxial connector 3 includes an outer conductor 3a, an inner conductor 3c, and a dielectric 3b interposed therebetween. A harmonic suppression circuit 4 and a microwave amplifier 5 are placed in this order on the metal carrier 2 from the output side end of the housing body 1a toward the input side end (not shown).

  The output side of the microwave amplifier 5 and the harmonic suppression circuit 4 are connected via a gold ribbon 6, and the harmonic suppression circuit 4 and the inner conductor 3 c of the coaxial connector 3 are connected via a gold ribbon 7. Yes. That is, the output of the microwave amplifier 5 is transmitted to the coaxial connector 3 through the gold ribbon 6, the harmonic suppression circuit 4, and the gold ribbon 7.

  In the above configuration, when a harmonic signal exceeding the cut-off frequency of the module housing 1 is radiated from the gold ribbon 6 connected to the output side of the microwave amplifier 5 to the space in the module housing 1, the wave is guided. The harmonic signal propagated in the tube mode is coupled to the gold ribbon 7 without being suppressed by the harmonic suppression circuit 4 and leaks to the outside through the coaxial connector 3.

  Therefore, in the present embodiment, paying attention to the fact that a plurality of electric field concentration portions are formed in the module casing 1 due to the casing resonance of the harmonic signal propagating in the waveguide mode. The terminator loaded antenna 8 is provided at a position on the ceiling surface of the module housing 1 (ie, the back surface of the cover 1a) corresponding to the vicinity of at least one electric field concentration location among the locations.

  The terminator loaded antenna 8 induces energy of the harmonic signal by combining the antenna with the harmonic signal propagating through the space in the module housing 1 in the waveguide mode, and the loaded terminator is induced by the antenna. The energy of the higher harmonic signal is converted to heat energy and absorbed. Thereby, since the power of the harmonic signal propagating through the space in the module housing 1 can be weakened, a housing structure capable of suppressing harmonic leakage to the outside can be obtained.

  Hereinafter, various embodiments of the terminator loaded antenna 8 are shown as examples. Thus, it can be seen that there is an advantage that the coupling frequency and the coupling amount can be freely selected in the selection of the frequency and the Q value in the antenna design.

  In each of the embodiments (FIGS. 2 to 11), for ease of understanding, the module housing 1 is shown upside down, the lower side is the cover 1b with the back side facing up, and the upper side is the floor surface. It is the housing body 1a from which is omitted. Although the coaxial connector 3 is not shown, it is assumed that the left end side of the housing body 1a is the output side end to which the coaxial connector 3 is attached.

  2, 3, 6, 8, and 11, a waveguide is used as an electric field concentration portion formed when a harmonic signal propagates in a space in the module housing 1 in a waveguide mode. When the so-called in-tube wavelength of the harmonic signal propagating in the mode is λ, an electric field concentration point formed at a position λ / 4 away from the output side end face of the housing body 1a (position where the electric field direction is upward: standing) Wave maximum amplitude position) and an opposite-phase electric field concentration point (position where the electric field direction is downward) formed at a position away from it by λ / 2 (that is, 3λ / 4 from the output side end face of the housing body 1a): The minimum amplitude position of the standing wave) is shown.

<Example 1>
FIG. 2 is a conceptual diagram for explaining the first embodiment. FIG. 2 shows an example in which the open end type antenna 8-1 loaded with the terminator 9-1 at the base end is used as the terminator loaded antenna 8. In FIG. 2, a cylindrical metal ring 10 is fixed to the back surface (ceiling surface) of the cover 1 b, and an open end type is provided at the axial position of the metal ring 10 on the surface of the dielectric 11 filled in the ring of the metal ring 10. The antenna 8-1 is erected. The terminator 9-1 is disposed on the surface of the dielectric 11 around the base end of the open-ended antenna 8-1.

  As shown in FIG. 2, the open-ended antenna 8-1 has a metal ring 10 on the back surface of the cover 1b so that the axial position of the metal ring 10 is located about λ / 4 away from the output side end surface of the housing body 1a. When fixed, the housing body 1a is arranged at a position away from the output side end face by about λ / 4. The length of the open tip antenna 8-1 is determined according to the space size in the module housing 1.

  According to this configuration, since the position away from the output side end face of the housing body 1a by λ / 4 is the electric field concentration portion, the harmonic signal propagating in the space in the module housing 1 in the waveguide mode is effective. In addition, it can be coupled to and absorbed by an open-ended antenna loaded with a terminator, and harmonics leaking to the outside can be suppressed.

<Example 2>
FIG. 3 is a conceptual diagram illustrating the second embodiment. In FIG. 3, when the open-ended antenna 8-1 loaded with the terminator 9-1 shown in FIG. 2 is embedded in the substrate 12 in advance, and the substrate 12 is fixed at a predetermined position on the back surface of the cover 1b, An example is shown in which the open-ended antenna 8-1 is disposed at a position separated by about λ / 4 from the output side end face of the housing body 1a.

  According to the second embodiment, since the open-ended antenna 8-1 loaded with the terminator 9-1 is stored in the substrate 12 in advance, a harmonic signal leaking to the outside from the output end side of the housing body 1a is generated. In addition to the effect of suppressing, the effect of improving productivity can be obtained.

<Example 3>
FIG. 4 is a conceptual diagram for explaining the third embodiment. In FIG. 4, a plurality of open-ended antennas 8-1 loaded with the terminator 9-1 shown in FIG. 2 (in the example shown in the figure) are separated from the output side end face of the housing body 1a by about λ / 4. 2) are arranged in the short direction (Y direction). As a result, the open-ended antenna 8-1 can be brought into contact with a larger amount of electric field in the vicinity of the electric field concentration portion due to the harmonic signal of the output frequency of the microwave amplifier 5, and this is caused by the output of the microwave amplifier 5. More harmonic energy of the harmonic signal can be coupled to the open-ended antenna 8-1 and absorbed by the terminator 9-1.

  In addition, the harmonic signal propagating in the module housing 1 is caused by various output frequencies of the microwave amplifier 5. If the wavelength of such a harmonic signal of other frequency is λ ′, an electric field concentration portion is formed at a position λ ′ / 4 away from the output side end face of the housing body 1a. The position away from the output side end face of the casing body 1a by λ ′ / 4 and the position away from the output side end face of the casing body 1a by λ / 4 are in a positional relationship shifted in the longitudinal direction (X direction). .

  Therefore, in order to be able to cope with harmonic signals of such other frequencies as well, as shown in FIG. 4, at a position separated by about λ ′ / 4 from the output side end face of the casing body 1a. A plurality (two in the illustrated example) of the open-ended antennas 8-1 loaded with the terminator 9-1 shown in Fig. 2 are arranged in the short direction (Y direction). As a result, the open-ended antenna 8-1 can be brought into contact with a larger electric field in the vicinity of the electric field concentration location due to the harmonic signal of another frequency, so that more harmonics of the harmonic signal of the other frequency can be obtained. Energy can be coupled to the open-ended antenna 8-1 and absorbed by the terminator 9-1.

  Thus, in the third embodiment, the antenna array 13 of the terminator-loaded open-ended antenna with respect to the harmonic signal (wavelength λ) caused by the output of the microwave amplifier 5 and the harmonic signal (wavelength λ ′) of other frequencies. Since the antenna array 14 of the terminator loaded tip open antenna with respect to) is juxtaposed, the band of the harmonic signal that can be suppressed as compared with the first embodiment can be widened, and at the same time, the connectivity with the antenna can be enhanced.

<Example 4>
FIG. 5 is a conceptual diagram for explaining the fourth embodiment. In FIG. 5, when the antenna rows 13 and 14 shown in FIG. 4 are formed in the substrate 12 in advance and the substrate 12 is fixed to a predetermined position on the back surface of the cover 1b, the antenna row 13 is output from the housing body 1a. An example is shown in which the antenna array 14 is arranged at a position separated by about λ / 4 from the side end face, and the antenna array 14 is arranged at a position separated by about λ ′ / 4 from the output side end face of the housing body 1a.

  According to the fourth embodiment, it is possible to widen the band of the harmonic signal that can be suppressed as compared with the second embodiment, and at the same time, it is possible to improve the connectivity with the antenna. In addition, productivity can be improved.

<Example 5>
FIG. 6 is a conceptual diagram for explaining the fifth embodiment. FIG. 5 shows an example in which a short-circuited tip antenna 8-2 loaded with a terminator 9-2 on the front end side is used for the terminator loaded antenna 8. In FIG. 5, the tip short-circuited antenna 8-2 is disposed on the surface of the substrate 12 fixed at a predetermined position on the back surface of the cover 1b. The base end of the tip short-circuited antenna 8-2 is connected to the back surface of the cover 1b, which is the ground, through a through hole 15 penetrating the upper and lower surfaces provided on the substrate 12. And it is the structure which attached the open stub 16 to the front-end | tip of the front-end | tip short circuit type antenna 8-2 on the surface of the board | substrate 12. FIG. The terminator 9-2 is attached to the attachment position of the open stub 15.

  As shown in FIG. 6, the tip short-circuited antenna 8-2 is arranged at a position about λ / 4 away from the output side end surface of the housing body 1a when the substrate 12 is fixed at a predetermined position on the back surface of the cover 1b. It has become.

  Also with the configuration of the fifth embodiment, similarly to the second embodiment, the effect of suppressing harmonics leaking to the outside and the effect of improving productivity can be obtained.

<Example 6>
FIG. 7 is a conceptual diagram for explaining the sixth embodiment. In FIG. 7, based on the same idea as in the fourth embodiment, the output of the microwave amplifier 5 by the plurality of short-circuited short-circuit antennas 8-2 loaded with the terminator 9-2 shown in FIG. The antenna row 16 of the terminator loaded tip short-circuited antenna for the resulting harmonic signal (wavelength λ) and the antenna row 17 of the terminator loaded tip short-circuited antenna for harmonic signals (wavelength λ ′) of other frequencies are juxtaposed. An example formed in this way is shown.

  In FIG. 7, when the substrate 12 is fixed to the back surface of the cover 1b at a predetermined position, the antenna row 16 is disposed at a position separated by about λ / 4 from the output side end surface of the housing body 1a, and the antenna row 17 is placed on the housing body 1a. It is the structure arrange | positioned in the position about (lambda) '/ 4 away from the output side end surface.

  According to the sixth embodiment, the band of the harmonic signal that can be suppressed as compared with the fifth embodiment can be widened, and at the same time, the connectivity with the antenna can be enhanced. In addition, productivity can be improved.

<Example 7>
FIG. 8 is a conceptual diagram for explaining the seventh embodiment. In FIG. 8, an example is shown in which a terminator loaded antenna 8 uses a both-end open rectangular microstrip antenna 8-3 loaded with two terminators 9-3a and 9-3b. In FIG. 8, the open-end-type rectangular microstrip antenna 8-3 is configured such that both end positions of a ½ wavelength conductor line 18 having a predetermined width are above the substrate 12 on the surface of the substrate 12 fixed at a predetermined position on the back surface of the cover 1 b. It is configured to be connected to the ground conductor on the back surface (the back surface of the cover 1b) through a through hole 18 that penetrates the bottom surface. Terminators 9-3a and 9-3b are attached to both end positions of the half-wave conductor line 18, respectively.

  When the substrate 12 is fixed at a predetermined position on the back surface of the cover 1b, the open-ended square microstrip antenna 8-3 has one end in the longitudinal direction of the half-wavelength conductor line 18 at λ / 4 from the output side end surface of the housing body 1a. The other end in the longitudinal direction of the half-wavelength conductor line 18 is arranged at a position about 3λ / 4 away from the output side end face of the housing body 1a.

  The position away from the output side end face of the casing body 1a by λ / 4 is an electric field concentration point in the casing resonance of the harmonic signal caused by the output of the microwave amplifier 5, and the position away from it by λ / 2 is This is where the electric field is concentrated due to the reverse phase relationship. Since this electric field relationship is equivalent to the TM100 mode of the open-ended square microstrip antenna 8-3, a high-frequency signal can be effectively coupled to the open-ended square microstrip antenna 8-3.

  In addition, since the electric field concentration location in the TM100 mode of the open-ended square microstrip antenna 8-3 is also a current concentration location, the terminators 9-3a and 9-3b mounted in the vicinity of the electric field concentration location are effective. The energy of the harmonic signal can be converted into heat energy and absorbed.

  Therefore, according to the seventh embodiment, since the open-ended square microstrip antenna loaded with two terminators is used, the effect of suppressing harmonics leaking to the outside can be improved more than in the first, second, and fifth embodiments. Can do.

<Example 8>
FIG. 9 is a conceptual diagram for explaining the eighth embodiment. In FIG. 9, based on the same idea as in Example 4, a plurality of open-ended square microstrip antennas 8-3 loaded with terminators 9-3a and 9-3b shown in FIG. Terminator-loaded open-ended square microstrip antenna array 20 for harmonic signals (wavelength λ) resulting from the output of the microwave amplifier 5 and terminator-loaded ends for harmonic signals (wavelength λ ′) of other frequencies An example is shown in which an antenna array 21 of an open rectangular microstrip antenna is juxtaposed.

  In FIG. 9, when the substrate 12 is fixed to the back surface of the cover 1b at a predetermined position, the antenna array 19 is disposed at a position separated by about λ / 4 from the output side end surface of the housing body 1a, and the antenna array 20 is disposed in the housing body 1a. It is the structure arrange | positioned in the position about (lambda) '/ 4 away from the output side end surface.

  According to the eighth embodiment, it is possible to widen the band of the harmonic signal that can be suppressed as compared with the seventh embodiment, and at the same time, it is possible to improve the connectivity with the antenna. In addition, productivity can be improved.

<Example 9>
FIG. 10 is a conceptual diagram for explaining the ninth embodiment. FIG. 10 shows an example in which the terminator loaded antenna 8 uses a one-side short-circuited rectangular microstrip antenna 8-4 loaded with a terminator 9-4. In FIG. 10, a single-sided short-circuited rectangular microstrip antenna 8-4 has a 1/4 wavelength conductor line 22 having a predetermined width formed on the surface of the substrate 12 fixed at a predetermined position on the back surface of the cover 1b. In this configuration, both end positions of the wavelength conductor line 22 are connected to the ground conductor on the back surface (the back surface of the cover 1b) through a through hole 23 penetrating the upper and lower surfaces of the substrate 12. The terminator 9-4 is attached to one end position of the quarter-wave conductor line 22.

  When the substrate 12 is fixed at a predetermined position on the back surface of the cover 1b, the one-side short-circuited rectangular microstrip antenna 8-4 has one end in the longitudinal direction of the quarter-wave conductor line 22 λ / 4 from the output-side end surface of the housing body 1a. The other end in the longitudinal direction of the quarter-wavelength conductor line 22 is disposed at a position separated by about λ / 4 from that position. The terminator 9-4 is attached to one end in the longitudinal direction of the quarter-wave conductor line 22 disposed at a position separated by about λ / 4 from the output side end face of the housing body 1a.

  The position away from the output side end face of the casing body 1a by λ / 4 is an electric field concentration point in the casing resonance of the harmonic signal caused by the output of the microwave amplifier 5, and the position away from it by λ / 4 is This is a short circuit where the electric field becomes zero. Since this electric field relationship is equal to the TM100 mode of the single-sided short-circuited rectangular microstrip antenna 8-4, a high-frequency signal can be effectively coupled to the single-sided short-circuited rectangular microstrip antenna 8-4.

  In addition, since the electric field concentration portion in the TM100 mode of the one-side short-circuited rectangular microstrip antenna 8-4 is also a current concentration portion, the terminator 9-4 mounted in the vicinity of the electric field concentration portion effectively converts the harmonic signal. Energy can be converted into thermal energy and absorbed.

  As described above, in the ninth embodiment, the harmonic signal leaking to the outside can be suppressed using the one-side short-circuited rectangular microstrip antenna loaded with the terminator.

<Example 10>
FIG. 11 is a conceptual diagram for explaining the tenth embodiment. In FIG. 11, based on the same idea as in the eighth embodiment, the microwave amplifier 5 includes a plurality of one-sided short-circuited rectangular microstrip antennas 8-4 loaded with the terminator 9-4 shown in FIG. The antenna array 24 of the open-ended square microstrip antenna with a terminator loaded for a harmonic signal (wavelength λ) caused by the output of the terminal, and the open-ended square micro with a terminator loaded for a harmonic signal (wavelength λ ′) of another frequency. An example is shown in which the antenna array 24 of strip antennas is juxtaposed.

  In FIG. 11, when the substrate 12 is fixed at a predetermined position on the back surface of the cover 1b, the antenna array 24 is disposed at a position separated by about λ / 4 from the output side end face of the housing body 1a, and the antenna array 22 is disposed in the housing body 1a. It is the structure arrange | positioned in the position about (lambda) '/ 4 away from the output side end surface.

  According to the tenth embodiment, it is possible to widen the band of the harmonic signal that can be suppressed compared to the ninth embodiment, and at the same time, it is possible to improve the connectivity with the antenna. In addition, productivity can be improved.

  As described above, the high-frequency module housing structure according to the present invention is useful as a high-frequency module housing structure that can suppress harmonic signals leaking to the outside.

DESCRIPTION OF SYMBOLS 1 Module housing | casing 1a Housing | casing main body 1b Cover 2 Metal carrier 3 Coaxial connector 4 Harmonic suppression circuit 5 Microwave amplifier 6,7 Gold ribbon 8 Terminator loading antenna 8-1 Open end type antenna 8-2 Short end type antenna 8 -3 Open-end square microstrip antenna 8-4 Single-sided short-circuited square microstrip antenna 9-1, 9-2, 9-3a, 9-3b, 9-4 Terminator 12 Substrate on which a terminator loaded antenna is formed 13 , 14 Antenna array of end-cable loaded open end antennas 16,17 Antenna array of end-clamped end short-circuited antennas 20,21 Antenna series of terminator-loaded both ends open type square microstrip antennas 24, 25 Terminator loaded one-sided short-circuit type Antenna array of rectangular microstrip antenna

Claims (16)

In a high-frequency module housing in which a microwave amplifier is arranged at the output stage,
On the ceiling surface of the high-frequency module housing corresponding to the vicinity of at least one electric field concentration location among a plurality of electric field concentration locations due to the housing resonance of harmonic signals propagating in the waveguide mode in the space in the high-frequency module housing An antenna disposed in place and coupled to the harmonic signal;
A high-frequency module housing structure comprising: a terminator loaded on the antenna and converting the energy of a harmonic signal induced in the antenna into thermal energy and absorbing it.   The high-frequency module housing structure according to claim 1, wherein the antenna loaded with the terminator is an open-ended antenna with a terminator loaded at the base end.   The open end type antenna loaded with the terminator is formed on a board so as to be arranged in the vicinity of the at least one electric field concentration portion when the board is fixed to the ceiling surface. 2. The high-frequency module housing structure according to 2.   The high-frequency module housing structure according to claim 2, wherein a plurality of open-ended antennas loaded with the terminator are arranged in the vicinity of the at least one electric field concentration portion.   A plurality of open-ended antennas loaded with the terminator are located near the at least one electric field concentration portion by the harmonic signal of the output frequency of the microwave amplifier and the at least one by the harmonic signal of another frequency. The high-frequency module housing structure according to claim 2, wherein the high-frequency module housing structure is disposed in the vicinity of two electric field concentration locations.   The said board | substrate is formed with the some open end type | mold antenna of the said termination | terminus device loading arrange | positioned in the vicinity of the said at least 1 electric field concentration location, when fixed to the said ceiling surface. 4. The high-frequency module housing structure according to 3.   A plurality of open-ended antennas of the terminator loaded that are arranged in the vicinity of the at least one electric field concentration location by the harmonic signal of the output frequency of the microwave amplifier when fixed to the ceiling surface on the substrate And a plurality of open-ended antennas of the terminator loaded disposed in the vicinity of the at least one electric field concentration location by the harmonic signals of other frequencies. Item 4. The high-frequency module housing structure according to Item 3. The antenna loaded with the terminator is a tip short-circuited antenna loaded with a terminator on the tip side,
The short-circuited tip antenna loaded with the terminator is formed on a substrate so as to be disposed in the vicinity of the at least one electric field concentration portion when the substrate is fixed to the ceiling surface. 2. The high-frequency module housing structure according to 1.   The terminal board is provided with a plurality of short-circuited short-end antennas loaded with the terminator disposed in the vicinity of the at least one electric field concentration location when fixed to the ceiling surface. 9. The high frequency module housing structure according to 8.   A plurality of short-circuited antennas of the terminator loaded disposed near the at least one electric field concentration location by the harmonic signal of the output frequency of the microwave amplifier when fixed to the ceiling surface on the substrate And a plurality of short-circuited antennas of the terminator loaded disposed in the vicinity of the at least one electric field concentration location by the harmonic signal of other frequencies, respectively. Item 9. The high-frequency module housing structure according to Item 8. The antenna loaded with the terminator is a both-end open rectangular microstrip antenna loaded with terminators at both ends of a half-wave conductor line,
The open-ended rectangular microstrip antenna loaded with the terminator is arranged such that one end of the half-wave conductor line is arranged in the vicinity of the at least one electric field concentration portion when the substrate is fixed to the ceiling surface. The high-frequency module housing according to claim 1, wherein the other end is disposed in the vicinity of another electric field concentration portion that is separated from the at least one electric field concentration portion by a half wavelength. Construction.   The substrate is formed with a plurality of open-ended rectangular microstrip antennas of the terminator loaded that are arranged in the vicinity of the at least one electric field concentration portion when fixed to the ceiling surface. The high-frequency module housing structure according to claim 11.   When the substrate is fixed to the ceiling surface, the both ends open type rectangular microstrip of the terminator loaded disposed in the vicinity of the at least one electric field concentration location by the harmonic signal of the output frequency of the microwave amplifier A plurality of antennas and a plurality of open-ended square microstrip antennas of the terminator loaded disposed in the vicinity of the at least one electric field concentration location by the harmonic signals of other frequencies are respectively formed. The high-frequency module housing structure according to claim 11. The antenna loaded with the terminator is a one-sided short-circuited rectangular microstrip antenna in which a terminator is loaded at one end of a quarter wavelength conductor line,
The one-sided short-circuited rectangular microstrip antenna loaded with the terminator is disposed on a substrate, and when the substrate is fixed to the ceiling surface, the one end of the ¼ wavelength conductor line is disposed in the vicinity of the at least one electric field concentration portion. The high-frequency module housing structure according to claim 1, wherein the other end is arranged to face another electric field concentration portion.   The substrate is formed with a plurality of one-sided short-circuited rectangular microstrip antennas loaded with the terminator disposed in the vicinity of the at least one electric field concentration portion when fixed to the ceiling surface. The high-frequency module housing structure according to claim 14.   When the substrate is fixed to the ceiling surface, the terminator-loaded one-sided short-circuited rectangular microstrip is disposed in the vicinity of the at least one electric field concentration location due to the harmonic signal of the output frequency of the microwave amplifier. A plurality of antennas and a plurality of one-sided short-circuited rectangular microstrip antennas loaded with the terminator are formed in the vicinity of the at least one electric field concentration location due to the harmonic signals of other frequencies. The high-frequency module housing structure according to claim 14.

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