WO2013136557A1 - Directional coupler - Google Patents
Directional coupler Download PDFInfo
- Publication number
- WO2013136557A1 WO2013136557A1 PCT/JP2012/073664 JP2012073664W WO2013136557A1 WO 2013136557 A1 WO2013136557 A1 WO 2013136557A1 JP 2012073664 W JP2012073664 W JP 2012073664W WO 2013136557 A1 WO2013136557 A1 WO 2013136557A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- directional coupler
- line
- dielectric substrate
- main line
- sub
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
- H01P5/185—Edge coupled lines
Definitions
- Embodiments of the present invention relate to, for example, a directional coupler used in a power amplifier for a digital television transmitter that transmits large power.
- a directional coupler has a general structure in which a microstrip line structure in which the entire back surface of a dielectric substrate is a conductor ground and a main line and sub-line (directional coupler) pattern is formed on the surface is used. Yes.
- the coupled line which is a part of the sub line, is arranged on the substrate with a line pattern having an appropriate length with a minute distance from the main line.
- this coupled line distance between the coupling port and the isolation port
- the directivity is best. It is known.
- the line length of ⁇ / 4 wavelength is long in the UHF band, and the circuit becomes large. Therefore, even if the directivity is sacrificed to some extent, a loop coupling line having an appropriate length shorter than ⁇ / 4 is often used.
- the output power level of the transmission line is large. Therefore, when detecting a large power, the directionality (isolation characteristics) of the directional coupler. Is emphasized. Therefore, realization of a small directional coupler capable of improving the directivity is demanded.
- the purpose of this embodiment is to provide a highly directional and small directional coupler.
- the directional coupler according to the present embodiment is formed on a dielectric substrate, a main line formed on the surface of the dielectric substrate, and a front surface or a back surface of the dielectric substrate, and the dielectric substrate is viewed in plan.
- a sub-line is sometimes disposed at a predetermined interval from the main line, and an opening is provided between the main line and the sub-line and penetrates the dielectric substrate.
- FIG. 1 is a perspective view showing a configuration of a directional coupler according to this embodiment.
- FIG. 2 is a plan view and a cross-sectional view of the directional coupler shown in FIG.
- FIG. 3 is a diagram showing a simulation result of the directional coupler shown in FIG.
- FIG. 4 is a perspective view illustrating a configuration of a directional coupler according to a comparative example.
- FIG. 5 is a plan view and a cross-sectional view of the directional coupler shown in FIG.
- FIG. 6 is a diagram showing a simulation result of the directional coupler shown in FIG.
- FIG. 1 is a perspective view showing a configuration of a directional coupler according to the present embodiment, and shows a directional coupler used as a high power amplifier for a digital terrestrial television transmitter as an example.
- 2A is a plan view of the directional coupler of FIG. 1
- FIG. 2B is a cross-sectional view along AA ′.
- the shield 15 is omitted.
- the main line 11 is disposed on the front surface of the dielectric substrate 10, and the sub line 12 is formed on the back surface of the dielectric substrate 10, and is disposed at a predetermined interval from the main line 11 when the dielectric substrate 10 is viewed in plan.
- the ground surface 13 of the sub line 12 is formed on the surface of the dielectric substrate 10 so as to overlap the sub line 12.
- the main line 11 uses a suspended line structure that can increase the line width in consideration of power durability.
- the sub line 12 uses a microstrip structure.
- the sub line 12 may be disposed on the surface of the dielectric substrate 10 by replacing the sub line 12 and the ground surface 13.
- an opening 14 is provided between the main line 11 and the sub line 12.
- the opening 14 penetrates the dielectric substrate 10.
- the width W and length L of the opening 14, the distance D 1 from the main line 11 to the opening, and the distance D 2 from the opening 14 to the coupled line portion of the sub line 12 are optimal using electromagnetic field simulation. Turn into.
- the influence of the opening 14 will be described. Since the main line 11 and the sub line 12 face each other and sandwich the dielectric substrate 10 and the periphery thereof is air, the phase speed of the even mode is higher than that of the odd mode, and therefore the directionality is deteriorated. In contrast, in the present embodiment, by providing the opening 14, the phase velocity of both modes can be made closer by eliminating a part of the dielectric of the dielectric substrate 10. Therefore, the directionality of the directional coupler can be improved.
- FIG. 3 shows a simulation result of the directional coupler according to this embodiment.
- the directionality D of the directional coupler is the difference between the degree of coupling I from the input port P1 to the coupling port P3 and the degree of coupling C from the input port P1 to the isolation port P4.
- Directionality D
- S2,1 corresponds to I
- S3,1 corresponds to C.
- FIG. 4 shows a configuration of a directional coupler according to a comparative example.
- FIG. 5A is a plan view of the directional coupler of FIG. 4
- FIG. 5B is a cross-sectional view along BB ′. Except not having provided the opening part 14, it is the structure similar to the directional coupler which concerns on this embodiment.
- the length of the coupled line is Lc ( ⁇ / 4 wavelength), and the distance to the main line is Dc.
- the degree of coupling is determined by Dc.
- a loop antenna-like wiring structure having a length Lc of a coupling line of a directional coupler shorter than ⁇ / 4 wavelength is widely used.
- this structure has a drawback that the directionality of the directional coupler is deteriorated because the phase transmission speeds of the even mode and the odd mode are different. In the case of loose coupling with a weak degree of coupling, the directionality tends to deteriorate further.
- FIG. 6 shows a simulation result of the directional coupler of FIG.
- the directionality D is calculated by the above formula (1) from the result of FIG. 6, it can be seen that the directionality is about 11 dB.
- the directivity is improved by 20 dB from that of FIG. 4, and the coupled line portion of the sub line 12 has a length of ⁇ / 4 wavelength. Even if it does not have, sufficient directionality can be obtained. Therefore, it can be seen that the directionality of the directional coupler can be improved by providing the opening 14.
- the present embodiment it is possible to improve the directivity by providing a correction opening between the main line and the sub line. Even if the coupled line does not have a length of ⁇ / 4 wavelength, high directivity can be obtained. Therefore, according to this embodiment, a highly directional and small directional coupler can be realized.
- the directional coupler can be provided in an output transmission path of a high power amplifier for a digital television transmitter in a UHF (Ultra-High Frequency) band. It is arranged between the combined output of the power amplifier and the output connector and used as a circuit for detecting the output level and reflection level of the output power.
- UHF Ultra-High Frequency
Landscapes
- Transmitters (AREA)
- Amplifiers (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
A directional coupler according to the present embodiment includes a dielectric substrate (10), a main line (11) formed on the front surface of the dielectric substrate (10), a sub line (12) formed on the front surface or the rear surface of the dielectric substrate (10) and placed with a predetermined gap from the main line (11) when the dielectric substrate (10) is viewed in plan, and an opening (14) penetrating the dielectric substrate (10) between the main line (11) and the sub line (12).
Description
本発明の実施形態は、例えば、大電力を伝送するデジタルテレビ送信機用の電力増幅器に用いられる方向性結合器に関する。
Embodiments of the present invention relate to, for example, a directional coupler used in a power amplifier for a digital television transmitter that transmits large power.
従来、方向性結合器は一般的な構造として、誘電体基板の裏面全面が導体グランドで、その表面に主線路および副線路（方向性結合器）パターンを構築するマイクロストリップライン構造が用いられている。副線路の一部となる結合線路は、基板上に適切な長さの線路パターンを主線路から微小な間隔をあけて配置されている。
Conventionally, a directional coupler has a general structure in which a microstrip line structure in which the entire back surface of a dielectric substrate is a conductor ground and a main line and sub-line (directional coupler) pattern is formed on the surface is used. Yes. The coupled line, which is a part of the sub line, is arranged on the substrate with a line pattern having an appropriate length with a minute distance from the main line.
一般的にこの結合線路の長さ（カップリングポートとアイソレーションポートとの間の距離）を、主線路から検波する伝送信号の波長λに対してλ／４にすれば、方向性が最も良いことが知られている。しかし、ＵＨＦ帯においてλ／４波長の線路長が長く、回路が大型になってしまう。そこで、方向性をある程度犠牲にしても、λ／4より短い適切な長さを持つループ結合線路がよく用いられている。
In general, when the length of this coupled line (distance between the coupling port and the isolation port) is λ / 4 with respect to the wavelength λ of the transmission signal detected from the main line, the directivity is best. It is known. However, the line length of λ / 4 wavelength is long in the UHF band, and the circuit becomes large. Therefore, even if the directivity is sacrificed to some extent, a loop coupling line having an appropriate length shorter than λ / 4 is often used.
ところで、デジタルテレビ送信機用電力増幅器など大電力信号を伝送する装置では、伝送路の出力電力のレベルが大きいため、大電力を検波する際には、方向結合器の方向性（アイソレーション特性）が重要視されている。したがって、方向性を改善できる小型の方向性結合器の実現が求められている。
By the way, in a device that transmits a high power signal such as a power amplifier for a digital television transmitter, the output power level of the transmission line is large. Therefore, when detecting a large power, the directionality (isolation characteristics) of the directional coupler. Is emphasized. Therefore, realization of a small directional coupler capable of improving the directivity is demanded.
本実施形態の目的は、高方向性かつ小型の方向性結合器を提供することにある。
The purpose of this embodiment is to provide a highly directional and small directional coupler.
本実施形態に係る方向性結合器は、誘電体基板と、前記誘電体基板の表面に形成される主線路と、前記誘電体基板の表面又は裏面に形成され、前記誘電体基板を平面視したときに前記主線路から所定間隔をあけて配置される副線路と、前記主線路と前記副線路との間に設けられ前記誘電体基板を貫通する開口部とを具備するものである。
The directional coupler according to the present embodiment is formed on a dielectric substrate, a main line formed on the surface of the dielectric substrate, and a front surface or a back surface of the dielectric substrate, and the dielectric substrate is viewed in plan. A sub-line is sometimes disposed at a predetermined interval from the main line, and an opening is provided between the main line and the sub-line and penetrates the dielectric substrate.
以下、図面を参照しながら本実施形態に係る方向性結合器を説明する。
Hereinafter, the directional coupler according to the present embodiment will be described with reference to the drawings.
図１は、本実施形態に係る方向性結合器の構成を示す斜視図であり、地上デジタルテレビ送信機用大電力増幅器に使用される方向結合器を一例として示している。図２（ａ）は、図１の方向性結合器の平面図であり、図２（ｂ）は、Ａ－Ａ´断面図である。なお、図１においてシールド１５は省略している。
FIG. 1 is a perspective view showing a configuration of a directional coupler according to the present embodiment, and shows a directional coupler used as a high power amplifier for a digital terrestrial television transmitter as an example. 2A is a plan view of the directional coupler of FIG. 1, and FIG. 2B is a cross-sectional view along AA ′. In FIG. 1, the shield 15 is omitted.
主線路１１は、誘電体基板１０の表面に配置され、副線路１２は誘電体基板１０の裏面に形成され、誘電体基板１０を平面視したときに主線路１１から所定間隔をあけて配置される。また、副線路１２に重なるように誘電体基板１０の表面に、副線路１２のグランド面１３が形成される。主線路１１は耐電力性を考慮し、線路幅が広くできるサスペンデッド線路構造を用いる。副線路１２はマイクロストリップ構造を用いる。なお、副線路１２とグランド面１３を入れ替えて副線路１２は誘電体基板１０の表面に配置してもよい。
The main line 11 is disposed on the front surface of the dielectric substrate 10, and the sub line 12 is formed on the back surface of the dielectric substrate 10, and is disposed at a predetermined interval from the main line 11 when the dielectric substrate 10 is viewed in plan. The In addition, the ground surface 13 of the sub line 12 is formed on the surface of the dielectric substrate 10 so as to overlap the sub line 12. The main line 11 uses a suspended line structure that can increase the line width in consideration of power durability. The sub line 12 uses a microstrip structure. The sub line 12 may be disposed on the surface of the dielectric substrate 10 by replacing the sub line 12 and the ground surface 13.
さらに、主線路１１と副線路１２との間に開口部１４を設ける。この開口部１４は誘電体基板１０を貫通するものである。この開口部１４の幅Ｗ、長さＬの形状、主線路１１から開口部までの距離Ｄ１、および開口部１４から副線路１２の結合線路部分までの距離Ｄ２は、電磁界シミュレーションを用いて最適化する。
Furthermore, an opening 14 is provided between the main line 11 and the sub line 12. The opening 14 penetrates the dielectric substrate 10. The width W and length L of the opening 14, the distance D 1 from the main line 11 to the opening, and the distance D 2 from the opening 14 to the coupled line portion of the sub line 12 are optimal using electromagnetic field simulation. Turn into.
ここで、開口部１４による影響について説明する。主線路１１と副線路１２は対面して誘電体基板１０を挟む構造であり、その周辺は空気であるため、偶モードの位相速度が奇モードより速くなり、そのため方向性が劣化する。これに対し、本実施形態では開口部１４を設けることにより、誘電体基板１０の一部の誘電体を無くすことで両モードの位相速度を近づかせることができる。そのため、方向性結合器の方向性の改善が可能となる。
Here, the influence of the opening 14 will be described. Since the main line 11 and the sub line 12 face each other and sandwich the dielectric substrate 10 and the periphery thereof is air, the phase speed of the even mode is higher than that of the odd mode, and therefore the directionality is deteriorated. In contrast, in the present embodiment, by providing the opening 14, the phase velocity of both modes can be made closer by eliminating a part of the dielectric of the dielectric substrate 10. Therefore, the directionality of the directional coupler can be improved.
図３に、本実施形態に係る方向性結合器のシミュレーション結果を示す。下記の式（１）に示すように、方向性結合器の方向性Ｄは、入力ポートＰ１からのカップリングポートＰ３に対する結合度Ｉと入力ポートＰ１からのアイソレーションポートＰ４に対する結合度Ｃの差分により計算できる。
FIG. 3 shows a simulation result of the directional coupler according to this embodiment. As shown in the following equation (1), the directionality D of the directional coupler is the difference between the degree of coupling I from the input port P1 to the coupling port P3 and the degree of coupling C from the input port P1 to the isolation port P4. Can be calculated by
方向性Ｄ＝｜Ｉ－Ｃ｜［ｄB］・・・式（１）
図３の結果から上記式（１）により方向性Ｄを算出すると、３１ｄＢ程度の方向性が得られることが分かる。なお、図３中のＳ２，１はＩに、Ｓ３，１はＣに相当する。 Directionality D = | I−C | [dB] (1)
From the result of FIG. 3, it can be seen that the directionality of about 31 dB can be obtained by calculating the directionality D by the above formula (1). In FIG. 3, S2,1 corresponds to I, and S3,1 corresponds to C.
図３の結果から上記式（１）により方向性Ｄを算出すると、３１ｄＢ程度の方向性が得られることが分かる。なお、図３中のＳ２，１はＩに、Ｓ３，１はＣに相当する。 Directionality D = | I−C | [dB] (1)
From the result of FIG. 3, it can be seen that the directionality of about 31 dB can be obtained by calculating the directionality D by the above formula (1). In FIG. 3, S2,1 corresponds to I, and S3,1 corresponds to C.
ここで、本実施形態との比較のため、図４に比較例に係る方向性結合器の構成を示す。図５（ａ）は、図４の方向性結合器の平面図であり、図５（ｂ）は、Ｂ－Ｂ´断面図である。開口部１４を設けていないこと以外は、本実施形態に係る方向性結合器と同様の構成である。
Here, for comparison with the present embodiment, FIG. 4 shows a configuration of a directional coupler according to a comparative example. FIG. 5A is a plan view of the directional coupler of FIG. 4, and FIG. 5B is a cross-sectional view along BB ′. Except not having provided the opening part 14, it is the structure similar to the directional coupler which concerns on this embodiment.
図５（ａ）において、結合線路の長さをＬｃ（＜λ／４波長）とし、主線路までの距離をＤｃとする。Ｄｃにより結合度が決まる。一般的に、方向性結合器の結合線路の長さＬｃは、λ／４波長より短いループアンテナ状の配線構造が広く用いられている。しかし、この構造では、偶モードと奇モードの位相伝送速度が異なるため、方向性結合器の方向性が劣化する欠点がある。結合度が弱い疎結合の場合はさらに、方向性が劣化する傾向がある。
5A, the length of the coupled line is Lc (<λ / 4 wavelength), and the distance to the main line is Dc. The degree of coupling is determined by Dc. Generally, a loop antenna-like wiring structure having a length Lc of a coupling line of a directional coupler shorter than λ / 4 wavelength is widely used. However, this structure has a drawback that the directionality of the directional coupler is deteriorated because the phase transmission speeds of the even mode and the odd mode are different. In the case of loose coupling with a weak degree of coupling, the directionality tends to deteriorate further.
図６に、図４の方向性結合器のシミュレーション結果を示す。図４の構造において、図６の結果から上記式（１）により方向性Ｄを算出すると、方向性は１１ｄＢ程度であることが分かる。
FIG. 6 shows a simulation result of the directional coupler of FIG. In the structure of FIG. 4, when the directionality D is calculated by the above formula (1) from the result of FIG. 6, it can be seen that the directionality is about 11 dB.
図３と図６とを比較すると、本実施形態の方向性結合器では、図４のものより方向性が２０ｄＢ改善されており、副線路１２の結合線路部分がλ／４波長の長さを有しなくても、十分な方向性を得ることができる。したがって、この開口部１４を設けることにより、方向性結合器の方向性が改善できていることが分かる。
Comparing FIG. 3 and FIG. 6, in the directional coupler of this embodiment, the directivity is improved by 20 dB from that of FIG. 4, and the coupled line portion of the sub line 12 has a length of λ / 4 wavelength. Even if it does not have, sufficient directionality can be obtained. Therefore, it can be seen that the directionality of the directional coupler can be improved by providing the opening 14.
以上述べたように本実施形態では、主線路と副線路との間に補正用の開口部を設けることによって方向性の改善が可能となる。結合線路はλ／４波長の長さがなくても、高方向性が得られる。したがって、本実施形態によれば、高方向性かつ小型の方向性結合器を実現することができる。
As described above, in the present embodiment, it is possible to improve the directivity by providing a correction opening between the main line and the sub line. Even if the coupled line does not have a length of λ / 4 wavelength, high directivity can be obtained. Therefore, according to this embodiment, a highly directional and small directional coupler can be realized.
さらに、本実施形態に係る方向性結合器の応用例としては、例えば、ＵＨＦ（Ultra-High Frequency）帯におけるデジタルテレビ送信機用の大電力増幅器の出力伝送路に設けることができる。電力増幅器の合成出力と出力コネクタとの間に配置し、出力電力の出力レベルおよび反射レベルを検出する回路として使用する。
Furthermore, as an application example of the directional coupler according to the present embodiment, for example, it can be provided in an output transmission path of a high power amplifier for a digital television transmitter in a UHF (Ultra-High Frequency) band. It is arranged between the combined output of the power amplifier and the output connector and used as a circuit for detecting the output level and reflection level of the output power.
なお、いくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。
Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
Claims (2)
- 誘電体基板と、
前記誘電体基板の表面に形成される主線路と、
前記誘電体基板の表面又は裏面に形成され、前記誘電体基板を平面視したときに前記主線路から所定間隔をあけて配置される副線路と、
前記主線路と前記副線路との間に設けられ前記誘電体基板を貫通する開口部と
を具備することを特徴とする方向性結合器。 A dielectric substrate;
A main line formed on the surface of the dielectric substrate;
A sub line formed on the front surface or the back surface of the dielectric substrate and disposed at a predetermined interval from the main line when the dielectric substrate is viewed in plan;
A directional coupler comprising: an opening provided between the main line and the sub line and penetrating the dielectric substrate. - 前記副線路の長さは、前記主線路から検波する伝送信号の波長λに対してλ／４よりも短いことを特徴とする請求項１に記載の方向性結合器。 The directional coupler according to claim 1, wherein the length of the sub line is shorter than λ / 4 with respect to a wavelength λ of a transmission signal detected from the main line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280070947.9A CN104137328B (en) | 2012-03-14 | 2012-09-14 | Directional coupler |
| EP12871488.8A EP2827441B1 (en) | 2012-03-14 | 2012-09-14 | Directional coupler |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012057525A JP5439527B2 (en) | 2012-03-14 | 2012-03-14 | Directional coupler |
| JP2012-057525 | 2012-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013136557A1 true WO2013136557A1 (en) | 2013-09-19 |
Family
ID=49160513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/073664 WO2013136557A1 (en) | 2012-03-14 | 2012-09-14 | Directional coupler |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2827441B1 (en) |
| JP (1) | JP5439527B2 (en) |
| CN (1) | CN104137328B (en) |
| WO (1) | WO2013136557A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018088640A (en) | 2016-11-29 | 2018-06-07 | 株式会社東芝 | Manufacturing method of directional coupler |
| RU188691U1 (en) * | 2019-02-07 | 2019-04-22 | Федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет аэрокосмического приборостроения" | Striped coupler |
| CN112034224B (en) * | 2020-08-25 | 2023-07-14 | 中国电子科技集团公司第三十六研究所 | Coupling detector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590810A (en) * | 1991-09-30 | 1993-04-09 | Ube Ind Ltd | Dielectric waveguide type directive coupler |
| JPH07336117A (en) | 1994-06-13 | 1995-12-22 | Murata Mfg Co Ltd | Directional coupler |
| JP2005210672A (en) * | 2003-12-24 | 2005-08-04 | Mitsubishi Electric Corp | Plating method and high-frequency line |
| JP2006238063A (en) * | 2005-02-25 | 2006-09-07 | Nec Corp | Directional coupler |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951218A (en) * | 1957-02-19 | 1960-08-30 | Itt | Directional couplings |
| JPS62114301A (en) * | 1985-11-13 | 1987-05-26 | Mitsubishi Electric Corp | Suspended line type directional coupler |
| KR100339373B1 (en) * | 1998-10-13 | 2002-07-18 | 구자홍 | micro strip coupler and method for fabricating the same |
| FI124514B (en) * | 2006-05-12 | 2014-09-30 | Filtronic Comtek Oy | The directional coupler |
| CN101577358B (en) * | 2009-06-23 | 2013-04-03 | 北京信息科技大学 | Micromechanical terahertz waveguide, terahertz waveguide type resonant cavity and preparation method thereof |
-
2012
- 2012-03-14 JP JP2012057525A patent/JP5439527B2/en active Active
- 2012-09-14 EP EP12871488.8A patent/EP2827441B1/en active Active
- 2012-09-14 CN CN201280070947.9A patent/CN104137328B/en active Active
- 2012-09-14 WO PCT/JP2012/073664 patent/WO2013136557A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590810A (en) * | 1991-09-30 | 1993-04-09 | Ube Ind Ltd | Dielectric waveguide type directive coupler |
| JPH07336117A (en) | 1994-06-13 | 1995-12-22 | Murata Mfg Co Ltd | Directional coupler |
| JP2005210672A (en) * | 2003-12-24 | 2005-08-04 | Mitsubishi Electric Corp | Plating method and high-frequency line |
| JP2006238063A (en) * | 2005-02-25 | 2006-09-07 | Nec Corp | Directional coupler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104137328A (en) | 2014-11-05 |
| CN104137328B (en) | 2017-03-08 |
| JP5439527B2 (en) | 2014-03-12 |
| EP2827441A4 (en) | 2015-11-04 |
| EP2827441A1 (en) | 2015-01-21 |
| EP2827441B1 (en) | 2019-10-23 |
| JP2013192084A (en) | 2013-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2022080160A (en) | Wireless transmission system, control method, and program | |
| JPWO2008090846A1 (en) | emblem | |
| JP5439527B2 (en) | Directional coupler | |
| US9979071B2 (en) | Electronic device | |
| JP5801362B2 (en) | Dielectric waveguide input / output structure and dielectric waveguide duplexer using the same | |
| WO2015133033A1 (en) | Microstrip antenna | |
| WO2017033722A1 (en) | Antenna device | |
| JP6091284B2 (en) | Directional coupler | |
| US20150180117A1 (en) | Inverted-f antenna provided with an isolation unit | |
| US9083069B2 (en) | Power combiner/distributor, power amplifying circuit, and wireless apparatus | |
| JP5698606B2 (en) | PCB antenna | |
| TWI578625B (en) | Electronic device and antenna thereof | |
| JP6219324B2 (en) | Planar transmission line waveguide converter | |
| JP2018117173A (en) | 90 degree hybrid circuit | |
| US20150137907A1 (en) | Directional coupler having high isolation | |
| US8093504B2 (en) | Circuit board structure employing ferrite element | |
| JP2008271074A (en) | High frequency coupler | |
| JP2013243487A (en) | On-vehicle antenna | |
| JP5981466B2 (en) | Planar transmission line waveguide converter | |
| KR101898634B1 (en) | Orthogonal polarization dual antenna device | |
| KR101279261B1 (en) | Wideband multi mode dielectric filter | |
| JP2011228852A (en) | Radome | |
| JP2012060614A (en) | Directional coupler | |
| JP2010057022A (en) | Composite antenna | |
| US20190067833A1 (en) | Array antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12871488 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2012871488 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |