JPH02260802A - Strip line type diode attenuator - Google Patents

Strip line type diode attenuator

Info

Publication number
JPH02260802A
JPH02260802A JP8065189A JP8065189A JPH02260802A JP H02260802 A JPH02260802 A JP H02260802A JP 8065189 A JP8065189 A JP 8065189A JP 8065189 A JP8065189 A JP 8065189A JP H02260802 A JPH02260802 A JP H02260802A
Authority
JP
Japan
Prior art keywords
diode
diodes
turned
wavelength
attenuation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8065189A
Other languages
Japanese (ja)
Inventor
Shinichiro Kitano
進一郎 北野
Tomoaki Sariyou
佐梁　智昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP8065189A priority Critical patent/JPH02260802A/en
Publication of JPH02260802A publication Critical patent/JPH02260802A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To protect the entire circuit even when a bias circuit is faulty by connecting branch strip lines whose length is a 1/4 wavelength in parallel between a strip line for sending an input signal and two diodes at an interval of nearly 1/4 wavelength and maximizing the attenuation when the diode is turned off. CONSTITUTION:Strip lines 4, 5 are strip lines whose length is nearly a 1/4 wavelength branched in parallel from a transmission microstrip line 3 at an interval of nearly 1/4 wavelength. The strip lines act like opening points 4', 5' when points 6', 7' are short-circuited, that is, diodes 6, 7 are turned on, and short- circuiting the points 4', 5' when the points 6', 7' are opened, that is, the diodes 6, 7 are turned off, and the attenuation is minimized when the diodes are turned on and maximized when the diodes are turned off. Since the attenuation is maximized when the diodes are turned off, an RF signal is attenuated when a bias circuit is faulty, then the entire circuit is protected.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は減衰器に関し、特にストリップラインとダイオ
ードを用いた減衰器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an attenuator, and particularly to an attenuator using a strip line and a diode.

〔従来の技術〕[Conventional technology]

従来、この種の減衰器は第２図のように、基板１３及び
２３上に各々形成された入力信号伝送用ストリップライ
ン１１及び２１とＰＩＮダイオード１２及び２２で構成
されており、これらはワイヤ１４で接続されている。Conventionally, this type of attenuator is composed of input signal transmission strip lines 11 and 21 and PIN diodes 12 and 22 formed on substrates 13 and 23, respectively, as shown in FIG. connected with.

この減衰器において、入力１に供給された入力信号（例
えば、ＲＦ倍信号は、ダイオード１２゜２２にて減衰さ
れて出力２に現れる。入力信号の減衰はダイオードがオ
ンの時に大きく、オフの時に小となる。In this attenuator, an input signal (for example, an RF multiplied signal) supplied to input 1 is attenuated by a diode 12°22 and appears at output 2.The attenuation of the input signal is large when the diode is on, and is large when the diode is off. becomes small.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の減衰器は、ダイオードのオフ時に減衰量
が最小になるため、ダイオードのバイアス回路（図示せ
ず）が故障したときに、入力のＲＦ倍信号出力にそのま
ま現れ、オーバーパワーとなって回路全体を破壊してし
まう可能性がある。In the conventional attenuator described above, the amount of attenuation is minimized when the diode is off, so if the diode bias circuit (not shown) fails, it will appear as it is in the RF multiplied signal output of the input, resulting in overpower. There is a possibility that the entire circuit will be destroyed.

また、第２図のように、ワイヤーボンディングを４箇所
しなければならず、組み立てに時間がかかるという問題
がある。更に、ワイヤーボンディングをする箇所が多い
分、通過損失が増大するという問題もある。Furthermore, as shown in FIG. 2, wire bonding must be performed at four locations, which poses a problem in that it takes time to assemble. Furthermore, there is also the problem that the passage loss increases because there are many locations where wire bonding is performed.

本発明はバイアス回路が故障した場合に回路全体を保護
するようにしたダイオード減衰器を提供することを目的
としている。It is an object of the present invention to provide a diode attenuator which protects the entire circuit in case of failure of the bias circuit.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のストリップライン型ダイオード減衰器は、ＲＦ
入力信号伝送用ストリップラインと２つのダイオードの
間に各々１７４波長の分岐ストリップラインを設けて、
この分岐ストリップラインを約１７４波長の間隔で並列
に構成し、ダイオードのオフ時に減衰量を最大に、ダイ
オードのオン時に減衰量を最小となるように構成してい
る。The stripline diode attenuator of the present invention has an RF
Branch strip lines each having 174 wavelengths are provided between the input signal transmission strip line and the two diodes,
These branch strip lines are arranged in parallel at intervals of about 174 wavelengths, and are configured so that the amount of attenuation is maximized when the diode is off, and the amount of attenuation is minimized when the diode is on.

〔作用〕[Effect]

上述した構成では、ダイオードがオフの時に減衰が最大
となり、バイアス回路が故障したときにＲＦ倍信号減衰
させて回路を保護する。In the above-described configuration, the attenuation is maximum when the diode is off, and when the bias circuit fails, the signal is attenuated by RF times to protect the circuit.

〔実施例〕〔Example〕

次に、本発明を図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例の平面図である。この減衰器
は、少なくとも、基板８に形成されたストリップライン
３，４．５と、ＰＩＮダイオード６．７とで構成され、
ストリップライン４．５とダイオード６．７とはワイヤ
９．１０により接続されている。FIG. 1 is a plan view of one embodiment of the present invention. This attenuator is composed of at least strip lines 3 and 4.5 formed on the substrate 8 and a PIN diode 6.7,
Strip line 4.5 and diode 6.7 are connected by wire 9.10.

また、第１図において、■は入力でＲＦ倍信号入力され
、２は出力でＲＦ倍信号出力される。ストリップライン
３はＲＦ信号伝送用マイクロストリップラインで、約１
７４波長の長さである。また、ストリップライン４．５
は伝送用マイクロストリップラインから約１７４波長の
間隔をもって並列分岐された約１／４波長ストリツプラ
インである。このストリップラインは、点６’、７’が
短絡、即ちダイオード６．７がオンの時に点４’、５’
が開放になるように、また点６’、７’が開放、即ちダ
イオード６．７がオフの時に点４’、５’が短絡になる
ようにする働きがあり、これによりダイオードオン時に
は減衰量が最小、オフ時には最大になる。Further, in FIG. 1, the RF multiplied signal is input at the input, and the RF multiplied signal is output at the output. Stripline 3 is a microstripline for RF signal transmission, and is approximately 1
It is 74 wavelengths long. Also, strip line 4.5
are approximately 1/4 wavelength strip lines branched in parallel at intervals of approximately 174 wavelengths from the transmission microstrip line. This stripline is connected to points 4' and 5' when points 6' and 7' are shorted, i.e. when diode 6.7 is on.
When the diode 6.7 is off, points 4' and 5' are shorted, so that when the diode 6.7 is off, the attenuation decreases. is the minimum, and maximum when off.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、ダイオードがオフ時で減
衰が最大となるため、バイアス回路が故障したときにＲ
Ｆ倍信号減衰させるため、回路全体を保護できる効果が
ある。また、ワイヤーボンディングの箇所が減るため製
作が容易となり、かつストリップラインの箇所が増える
ため通過損失を低く抑えることができる効果がある。As explained above, in the present invention, the attenuation is maximum when the diode is off, so when the bias circuit fails, R
Since the signal is attenuated by a factor of F, it has the effect of protecting the entire circuit. Furthermore, since the number of wire bonding locations is reduced, manufacturing becomes easier, and the number of stripline locations is increased, which has the effect of suppressing passing loss to a low level.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例の平面図、第２図は従来の減
衰器の一例の平面図である。 Ｉ・・・入力、２・・・出力、３・・・１／４波長スト
リツプライン、４，５・・・１／４λストリツプライン
、６．７・・・ダイオード、８・・・基板、９．ｌＯ・
・・ワイヤ、１１　２１・・・ストリップライン、１２
．２２・・・ダイオード、１３．２３・・・基板、１４
・・・ワイヤ。 第１図 第２図FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view of an example of a conventional attenuator. I...Input, 2...Output, 3...1/4 wavelength stripline, 4,5...1/4λ stripline, 6.7...Diode, 8...Substrate ,9. lO・
...Wire, 11 21...Strip line, 12
．． 22...Diode, 13.23...Substrate, 14
...Wire. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] １．入力信号伝送用ストリップラインに約１／４波長間
隔をもって並列に約１／４波長の２つの分岐ストリップ
ラインを接続し、更に前記分岐ストリップラインの先端
に各々ダイオードを接続して構成してなり、前記ダイオ
ードのオン時に減衰量が最小に、オフ時に最大となるこ
とを特徴とするストリップライン型ダイオード減衰器。1. Two branch strip lines of about 1/4 wavelength are connected in parallel to the input signal transmission strip line with an interval of about 1/4 wavelength, and further a diode is connected to the tip of each of the branch strip lines, A stripline diode attenuator characterized in that the amount of attenuation is minimum when the diode is on and maximum when the diode is off.
JP8065189A 1989-03-31 1989-03-31 Strip line type diode attenuator Pending JPH02260802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8065189A JPH02260802A (en) 1989-03-31 1989-03-31 Strip line type diode attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8065189A JPH02260802A (en) 1989-03-31 1989-03-31 Strip line type diode attenuator

Publications (1)

Publication Number Publication Date
JPH02260802A true JPH02260802A (en) 1990-10-23

Family

ID=13724270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8065189A Pending JPH02260802A (en) 1989-03-31 1989-03-31 Strip line type diode attenuator

Country Status (1)

Country Link
JP (1) JPH02260802A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08265005A (en) * 1995-03-22 1996-10-11 Nec Corp Attenuation circuit using quarter-wavelength line
JP2012004635A (en) * 2010-06-14 2012-01-05 New Japan Radio Co Ltd Temperature variable attenuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08265005A (en) * 1995-03-22 1996-10-11 Nec Corp Attenuation circuit using quarter-wavelength line
JP2012004635A (en) * 2010-06-14 2012-01-05 New Japan Radio Co Ltd Temperature variable attenuator

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