JPH06276045A - High frequency transducer - Google Patents

High frequency transducer

Info

Publication number
JPH06276045A
JPH06276045A JP5878393A JP5878393A JPH06276045A JP H06276045 A JPH06276045 A JP H06276045A JP 5878393 A JP5878393 A JP 5878393A JP 5878393 A JP5878393 A JP 5878393A JP H06276045 A JPH06276045 A JP H06276045A
Authority
JP
Japan
Prior art keywords
transducer
balanced
frequency
balance
high frequency
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
JP5878393A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Yoshida
和由 吉田
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.)
Toshiba Corp
Toshiba AVE Co Ltd
Original Assignee
Toshiba Corp
Toshiba AVE Co Ltd
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 Toshiba Corp, Toshiba AVE Co Ltd filed Critical Toshiba Corp
Priority to JP5878393A priority Critical patent/JPH06276045A/en
Publication of JPH06276045A publication Critical patent/JPH06276045A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To lead out a balance output signal which has low loss and is well balanced and equal in level even when a handled signal becomes wide and high in frequency band by interposing a tuning circuit which has a coil and a capacitor between the balance side terminal of the transducer for balance- imbalance conversion and a reference potential point. CONSTITUTION:The tuning 'circuit 18 constituted by connecting the coil L and capacitor C in parallel is interposed and connected between a ground terminal and an output terminal 14 where a high-level balance output signal OUT1 is led out between a couple of output terminals 14 and 15 on the balance side of the toroidal transducer 11. Consequently, he frequency correction of transmission characteristics can be performed, so the high frequency transducer capable of leading out the balance output signal which has low loss and is well balanced and equal in level even when the handled signal becomes wide and high in frequency band is obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、高周波信号を平衡−
不平衡変換(位相反転した2つの高周波信号を生成)す
る高周波トランスジューサに関する。
BACKGROUND OF THE INVENTION This invention balances high frequency signals.
The present invention relates to a high-frequency transducer that performs unbalance conversion (generates two high-frequency signals whose phases are inverted).

【0002】[0002]

【従来の技術】周知のように、例えば高周波受信機等に
あっては、広帯域に渡って周波数変換を行なう場合、D
BM(ダブル・バランス・ミクサ)回路が一般的に使用
されている。このとき、不平衡信号を平衡信号に変換す
るために、図6に示すようなトロイダル・トランスジュ
ーサ11が多く使われている。図7は、このトロイダル
・トランスジューサ11の等価回路を示しており、入力
端子12,13に供給された不平衡入力信号IN1,I
N2が、平衡出力信号OUT1,OUT2に変換されて
出力端子14,15から取り出される。
2. Description of the Related Art As is well known, for example, in a high frequency receiver, when frequency conversion is performed over a wide band, D
A BM (Double Balanced Mixer) circuit is commonly used. At this time, a toroidal transducer 11 as shown in FIG. 6 is often used to convert the unbalanced signal into a balanced signal. FIG. 7 shows an equivalent circuit of the toroidal transducer 11, which shows the unbalanced input signals IN1 and I supplied to the input terminals 12 and 13, respectively.
N2 is converted into balanced output signals OUT1 and OUT2 and taken out from the output terminals 14 and 15.

【0003】すなわち、トロイダル・トランスジューサ
11は、図6に示すように、フェライトリング・コア1
6に一対の導線17を巻いて構成されるわけであるが、
導線17の長さは、扱う信号の1/4波長よりも十分短
くする必要がある。また、フェライトリング・コア16
に巻いた導線17を伝搬する信号の波長は、空間を伝搬
する場合に対してμ-1/2(μはフェライトリング・コア
11の比透磁率)になり、高い周波数になるほど導線1
2の巻数も少なくなる。
That is, the toroidal transducer 11 has a ferrite ring core 1 as shown in FIG.
6 is formed by winding a pair of conducting wires 17,
The length of the conductor 17 must be sufficiently shorter than the quarter wavelength of the signal to be handled. In addition, the ferrite ring core 16
The wavelength of the signal propagating through the wire 17 wound around is .mu.-1 / 2 (.mu. Is the relative permeability of the ferrite ring core 11) as compared with the case of propagating in space.
The number of turns of 2 is also reduced.

【0004】図8(a),(b)及び図9(a),
(b)は、それぞれフェライトリング・コア16に巻く
導線17の巻数を8,6,4,3t(ターン)とした場
合の、トロイダル・トランスジューサ11の伝送特性を
示している。この伝送特性は、入力端子12,13にそ
れぞれ供給された不平衡入力信号IN1,IN2の周波
数を、3×105 MHzから1.5GHzまで変化させ
たときに、出力端子14から得られる平衡出力信号OU
T1(実線)と、他方の出力端子15から得られる平衡
出力信号OUT2(点線)とを示している。
8 (a) and 8 (b) and FIG. 9 (a),
(B) shows the transmission characteristics of the toroidal transducer 11 when the number of turns of the conductor wire 17 wound around the ferrite ring core 16 is 8, 6, 4, 3 t (turns). This transmission characteristic is that the frequency of the unbalanced input signals IN1 and IN2 supplied to the input terminals 12 and 13 is 3 × 10 5 Balanced output signal OU obtained from the output terminal 14 when changing from MHz to 1.5 GHz
T1 (solid line) and the balanced output signal OUT2 (dotted line) obtained from the other output terminal 15 are shown.

【0005】また、図8(a),(b)及び図9
(a),(b)の各伝送特性中に示したマーカM1は、
不平衡入力信号IN1,IN2の周波数が550MHz
のときを示し、このときの平衡出力信号OUT1はそれ
ぞれ−6.6763dB,−6.5248dB,−6.
9199dB,−6.887dBとなり、マーカM2
は、不平衡入力信号IN1,IN2の周波数が1GHz
のときを示し、このときの平衡出力信号OUT1はそれ
ぞれ−10.571dB,−8.7271dB,−7.
6414dB,−7.0342dBとなっている。
Further, FIGS. 8 (a), 8 (b) and 9
The marker M1 shown in the transmission characteristics of (a) and (b) is
The frequency of the unbalanced input signals IN1 and IN2 is 550 MHz
, And the balanced output signal OUT1 at this time is −6.6763 dB, −6.5248 dB, −6.
9199 dB, −6.887 dB, and the marker M2
The frequency of the unbalanced input signals IN1 and IN2 is 1 GHz
, And the balanced output signal OUT1 at this time is -10.571 dB, -8.727 dB, -7.
It is 6414 dB and -7.0342 dB.

【0006】これら4つの伝送特性から明らかなよう
に、フェライトリング・コア16に対する導線17の巻
数を減らすほど、より高い周波数まで不平衡入力信号I
N1,IN2が伝送されることになる反面、伝送損失の
差が大きくなって平衡出力信号OUT1とOUT2との
バランスが劣化することになる。また、不平衡入力信号
IN1,IN2の周波数が低いほど、平衡出力信号OU
T1とOUT2との差が大きくなるとともに、この差は
導線17の巻数が少なくなるほど大きくなっている。こ
れは、巻数が少なくなるつまり導線17が短くなるほ
ど、不平衡入力信号IN1,IN2が出力端子15に誘
導されにくくなるためである。
As is apparent from these four transmission characteristics, as the number of turns of the conductor wire 17 with respect to the ferrite ring core 16 is reduced, the unbalanced input signal I up to a higher frequency is obtained.
While N1 and IN2 are transmitted, the difference in transmission loss becomes large and the balance between the balanced output signals OUT1 and OUT2 deteriorates. Further, the lower the frequencies of the unbalanced input signals IN1 and IN2, the balanced output signal OU
The difference between T1 and OUT2 increases, and the difference increases as the number of turns of the conductive wire 17 decreases. This is because the unbalanced input signals IN1 and IN2 are less likely to be guided to the output terminal 15 as the number of turns decreases, that is, the conductive wire 17 becomes shorter.

【0007】ところで、最近の高周波受信機は、その技
術動向の1つである入力信号周波数範囲の拡大及びチャ
ンネル数の増加に伴なって、相互変調歪特性の広帯域に
渡る確保が重要な課題となってきている。特に2次の相
互変調歪(IM2)に関しては、前述したトロイダル・
トランスジューサ11を使用することにより減少させる
ことができる。理論的には、トロイダル・トランスジュ
ーサ11の平衡側となる出力端子14,15から取り出
される平衡出力信号OUT1,OUT2は、同一レベル
で180°の位相差(逆位相)を持つことになる。
By the way, in recent high frequency receivers, it is an important issue to secure the intermodulation distortion characteristic over a wide band with the expansion of the input signal frequency range and the increase in the number of channels, which are one of the technological trends. It has become to. Especially regarding the second-order intermodulation distortion (IM2), the above-mentioned toroidal
It can be reduced by using the transducer 11. Theoretically, the balanced output signals OUT1 and OUT2 output from the output terminals 14 and 15 on the balanced side of the toroidal transducer 11 have the same level and a phase difference of 180 ° (anti-phase).

【0008】このため、トロイダル・トランスジューサ
11の平衡側に接続された非線形素子により発生するI
M2成分は、理論上では互いに打ち消し合うため零にな
るはずであるが、実際には図8(a),(b)及び図9
(a),(b)に示したように、出力端子14,15か
ら取り出される平衡出力信号OUT1,OUT2にレベ
ル差が生じるため、零にはならないという問題が発生し
ている。
Therefore, I generated by the non-linear element connected to the balanced side of the toroidal transducer 11
The M2 component should theoretically be zero because they cancel each other out, but in reality, the M2 component should be zero, as shown in FIGS.
As shown in (a) and (b), there is a problem that the balanced output signals OUT1 and OUT2 taken out from the output terminals 14 and 15 have a level difference, so that they do not become zero.

【0009】[0009]

【発明が解決しようとする課題】以上のように、平衡−
不平衡変換用の従来のトロイダル・トランスジューサで
は、扱う信号の周波数が広帯域及び高周波になるにした
がって、レベルの等しい平衡出力信号を取り出すことが
困難になり、その結果DBM等に使用した場合、IM2
を悪化させる要因になるという問題を有している。
As described above, the equilibrium-
In the conventional toroidal transducer for unbalanced conversion, as the frequency of the signal to be handled becomes wide band and high frequency, it becomes difficult to take out the balanced output signal of the same level. As a result, when it is used for DBM etc., IM2
There is a problem that it becomes a factor to worsen.

【0010】そこで、この発明は上記事情を考慮してな
されたもので、扱う信号の周波数が広帯域及び高周波に
なっても、低損失でバランスが良くレベルの等しい平衡
出力信号を取り出すことが可能である極めて良好な高周
波トランスジューサを提供することを目的とする。
Therefore, the present invention has been made in consideration of the above circumstances, and it is possible to extract a balanced output signal having a low loss, a good balance, and an equal level even if the frequency of a signal to be handled becomes a wide band and a high frequency. The object is to provide some very good high frequency transducers.

【0011】[0011]

【課題を解決するための手段】この発明に係る高周波ト
ランスジューサは、平衡−不平衡変換用トランスジュー
サの平衡側端子と基準電位点との間に、コイルとコンデ
ンサとを有する同調回路を介在させるように構成したも
のである。
In the high frequency transducer according to the present invention, a tuning circuit having a coil and a capacitor is interposed between a balanced side terminal of a balanced-unbalanced transducer and a reference potential point. It is composed.

【0012】[0012]

【作用】上記のような構成によれば、平衡−不平衡変換
用トランスジューサの平衡側端子と基準電位点との間
に、コイルとコンデンサとを有する同調回路を介在させ
ることにより、伝送特性の周波数補正を行なうことがで
きるので、扱う信号の周波数が広帯域及び高周波になっ
ても、低損失でバランスが良くレベルの等しい平衡出力
信号を取り出すことが可能となる。
According to the above-mentioned structure, a tuning circuit having a coil and a capacitor is interposed between the balanced-side terminal of the transducer for balanced-unbalanced conversion and the reference potential point. Since the correction can be performed, even if the frequency of the signal to be handled is wide band and high frequency, it is possible to take out a balanced output signal with low loss and good balance and equal level.

【0013】[0013]

【実施例】以下、この発明の一実施例について図面を参
照して詳細に説明する。図1において、図6と同一部分
には同一符号を付して示している。すなわち、トロイダ
ル・トランスジューサ11の平衡側となる一対の出力端
子14,15のうち、レベルの高い方の平衡出力信号O
UT1が取り出される出力端子14と接地端との間に、
コイルLとコンデンサCとを並列接続してなる同調回路
18を介挿接続したことが、従来と異なる部分である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, the same parts as those in FIG. 6 are designated by the same reference numerals. That is, of the pair of output terminals 14 and 15 on the balanced side of the toroidal transducer 11, the balanced output signal O of the higher level is output.
Between the output terminal 14 from which the UT 1 is taken out and the ground terminal,
The difference from the prior art is that the tuning circuit 18 formed by connecting the coil L and the capacitor C in parallel is inserted and connected.

【0014】この実施例では、トロイダル・トランスジ
ューサ11として、太陽誘電株式会社製EM21RAD
4002020Nのフェライトリング・コア16に、導
線17として0.19φの二平行銅線を4回巻き付けた
ものを使用し、コンデンサCとして0.5pF、コイル
Lとして0.3d,2.0φ,6.5tを使用してお
り、扱う周波数帯域は90MHzから1GHzまでとな
っている。
In this embodiment, the toroidal transducer 11 is EM21RAD manufactured by Taiyo Yuden Co., Ltd.
A 4002020N ferrite ring core 16 with four 0.19φ bi-parallel copper wires wound as a conductor 17 is used, a capacitor C is 0.5 pF, and a coil L is 0.3d, 2.0φ, 6. 5t is used, and the frequency band handled is from 90MHz to 1GHz.

【0015】ここで、図2(a)は、このような同調回
路18を付加したトロイダル・トランスジューサ11の
伝送特性を示し、図2(b)は、同調回路18を付加し
ないトロイダル・トランスジューサ11の伝送特性を示
している。これらの伝送特性は、入力端子12,13に
それぞれ供給された不平衡入力信号IN1,IN2の周
波数を、3×105 MHzから1.5GHzまで変化さ
せたときに、出力端子14から得られる平衡出力信号O
UT1(実線)と、他方の出力端子15から得られる平
衡出力信号OUT2(点線)とを示している。
Here, FIG. 2A shows the transmission characteristics of the toroidal transducer 11 to which such a tuning circuit 18 is added, and FIG. 2B shows the toroidal transducer 11 to which the tuning circuit 18 is not added. The transmission characteristics are shown. These transmission characteristics are obtained by comparing the frequencies of the unbalanced input signals IN1 and IN2 supplied to the input terminals 12 and 13 with each other by 3 × 10 5 Balanced output signal O obtained from the output terminal 14 when changing from MHz to 1.5 GHz
UT1 (solid line) and the balanced output signal OUT2 (dotted line) obtained from the other output terminal 15 are shown.

【0016】また、図2(a),(b)の各伝送特性中
に示したマーカM1は、不平衡入力信号IN1,IN2
の周波数が550MHzのときを示し、このときの平衡
出力信号OUT1はそれぞれ−6.6642dB,−
6.7861dBとなり、マーカM2は、不平衡入力信
号IN1,IN2の周波数が1GHzのときを示し、こ
のときの平衡出力信号OUT1はそれぞれ−7.231
3dB,−7.5269dBとなっている。
The markers M1 shown in the transmission characteristics of FIGS. 2A and 2B are unbalanced input signals IN1 and IN2.
Frequency is 550 MHz, and the balanced output signal OUT1 at this time is −6.6642 dB, −, respectively.
6.7861 dB, and the marker M2 indicates that the frequency of the unbalanced input signals IN1 and IN2 is 1 GHz, and the balanced output signal OUT1 at this time is −7.231.
It is 3 dB and -7.5269 dB.

【0017】これらの伝送特性を比較して明らかなよう
に、同調回路18を付加しないトロイダル・トランスジ
ューサ11では、平衡出力信号OUT1とOUT2との
レベル差が1dB以上あるのに対し、同調回路18を付
加したトロイダル・トランスジューサ11では、平衡出
力信号OUT1とOUT2とのレベル差が0.3dB以
下に改善されており、扱う信号の周波数が広帯域及び高
周波になっても、低損失でバランスが良くレベルの等し
い平衡出力信号OUT1,OUT2を取り出すことが可
能となる。
As is clear from comparison of these transmission characteristics, in the toroidal transducer 11 to which the tuning circuit 18 is not added, the level difference between the balanced output signals OUT1 and OUT2 is 1 dB or more, whereas the tuning circuit 18 is used. With the added toroidal transducer 11, the level difference between the balanced output signals OUT1 and OUT2 is improved to 0.3 dB or less, and even if the frequency of the signal to be handled is wide band and high frequency, the loss is well balanced and the level is good. It is possible to extract equal balanced output signals OUT1 and OUT2.

【0018】ここで、上記同調回路18について説明す
ると、図3(a)に示すように、入力端子19,20を
介して同調回路18に入力信号を供給し、出力端子2
1,22から出力信号を取り出した場合の伝送特性は、
図3(b)に示すようになる。すなわち、この同調回路
18は、コイルLのインダクタンスを変化させることに
より、低域の立ち上がり曲線が設定され、また、コンデ
ンサCはコイルLと共振しており、その共振周波数fo
はfo =[2π(L・C)1/2 -1であるから、コンデ
ンサCのキャパシタンスを変化させることにより共振周
波数fo が設定される。
Now, the tuning circuit 18 will be described. As shown in FIG. 3A, an input signal is supplied to the tuning circuit 18 via the input terminals 19 and 20, and the output terminal 2 is supplied.
The transmission characteristics when the output signals are extracted from 1 and 22 are
It becomes as shown in FIG. In other words, the tuning circuit 18, by changing the inductance of the coil L, the rising curve of the low frequency range is set, also the capacitor C is resonates with the coil L, the resonant frequency f o
Is f o = [2π (L · C) 1/2 ] −1 , the resonance frequency f o is set by changing the capacitance of the capacitor C.

【0019】このため、同調回路18を、トロイダル・
トランスジューサ11の平衡側となる一対の出力端子1
4,15のうち、レベルの高い方の平衡出力信号OUT
1が取り出される出力端子14に接続することにより、
低域における平衡出力信号OUT1,OUT2のレベル
差が補正されるとともに、共振周波数fo を使用する周
波数帯域より高く設定することにより、共振周波数fo
より低い周波数で生じるはねかえり特性を利用して、高
域における平衡出力信号OUT1,OUT2のレベル差
が補正されるようになる。
Therefore, the tuning circuit 18 is replaced by a toroidal
A pair of output terminals 1 on the balanced side of the transducer 11.
Of the four and 15, the higher-balanced output signal OUT
By connecting to the output terminal 14 from which 1 is taken out,
With the level difference between the balanced output signals OUT1, OUT2 at the low frequency is corrected by setting higher than the frequency band to be used the resonant frequency f o, the resonance frequency f o
By utilizing the bounce characteristic that occurs at a lower frequency, the level difference between the balanced output signals OUT1 and OUT2 in the high frequency range is corrected.

【0020】これにより、同調回路18を付加しない場
合に、図4(a)に示すように、全域でレベル差が生じ
ていたトロイダル・トランスジューサ11の平衡出力信
号OUT1,OUT2が、同調回路18を付加すること
により、図4(b)に示すように、ほぼ全域でレベル差
がなくなるように補正されることになる。
As a result, when the tuning circuit 18 is not added, the balanced output signals OUT1 and OUT2 of the toroidal transducer 11, which have level differences over the entire area, as shown in FIG. By the addition, as shown in FIG. 4B, the level difference is corrected in almost the entire area.

【0021】次に、図5は、この発明の他の実施例を示
している。すなわち、これは、平衡−不平衡変換用のト
ランスジューサとして、トロイダル・トランスジューサ
11に代えてバルン・トランスジューサ19を用いたも
ので、この場合にも、バルン・トランスジューサ19の
平衡側となる一方の出力端子14と接地端との間に、コ
イルLとコンデンサCとを並列接続してなる同調回路1
8を介挿接続することで、平衡出力信号OUT1,OU
T2のレベルを広帯域に渡って等しく保つことができる
ようになる。
Next, FIG. 5 shows another embodiment of the present invention. That is, this is one in which a balun transducer 19 is used in place of the toroidal transducer 11 as a balanced-unbalanced transducer, and in this case also, one output terminal on the balanced side of the balun transducer 19 is used. A tuning circuit 1 in which a coil L and a capacitor C are connected in parallel between 14 and a ground terminal.
By connecting 8 through, balanced output signals OUT1, OU
It becomes possible to keep the level of T2 equal over a wide band.

【0022】ここで、上記各実施例では、入力信号が不
平衡で出力信号が平衡の場合について説明したが、これ
に限らずこの発明は、平衡の入力信号を不平衡の出力信
号に変換する場合にも使用できることはもちろんであ
る。なお、この発明は上記各実施例に限定されるもので
はなく、この外その要旨を逸脱しない範囲で種々変形し
て実施することができる。
In each of the above embodiments, the case where the input signal is unbalanced and the output signal is balanced has been described, but the present invention is not limited to this, and the balanced input signal is converted into an unbalanced output signal. Of course, it can also be used in cases. The present invention is not limited to the above-described embodiments, but can be variously modified and implemented without departing from the scope of the invention.

【0023】[0023]

【発明の効果】以上詳述したようにこの発明によれば、
扱う信号の周波数が広帯域及び高周波になっても、低損
失でバランスが良くレベルの等しい平衡出力信号を取り
出すことが可能である極めて良好な高周波トランスジュ
ーサを提供することができる。
As described above in detail, according to the present invention,
It is possible to provide an extremely good high-frequency transducer capable of taking out balanced output signals having low loss, good balance, and equal levels even when the frequencies of signals to be handled are wide band and high frequency.

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

【図1】この発明に係る高周波トランスジューサの一実
施例を示す回路構成図。
FIG. 1 is a circuit configuration diagram showing an embodiment of a high frequency transducer according to the present invention.

【図2】同実施例の効果を説明するために示す特性図。FIG. 2 is a characteristic diagram shown to explain the effect of the embodiment.

【図3】同実施例の同調回路の伝送特性を示す図。FIG. 3 is a diagram showing a transmission characteristic of the tuning circuit of the embodiment.

【図4】同同調回路を設けたことによる効果を説明する
ために示す図。
FIG. 4 is a diagram for explaining the effect of providing the same tuning circuit.

【図5】この発明の他の実施例を示す回路構成図。FIG. 5 is a circuit configuration diagram showing another embodiment of the present invention.

【図6】従来のトロイダル・トランスジューサの構成を
示す平面図。
FIG. 6 is a plan view showing the configuration of a conventional toroidal transducer.

【図7】同トロイダル・トランスジューサの等価回路を
示す回路構成図。
FIG. 7 is a circuit configuration diagram showing an equivalent circuit of the toroidal transducer.

【図8】同トロイダル・トランスジューサの伝送特性を
示す図。
FIG. 8 is a diagram showing transmission characteristics of the toroidal transducer.

【図9】同トロイダル・トランスジューサの伝送特性を
示す図。
FIG. 9 is a diagram showing transmission characteristics of the toroidal transducer.

【符号の説明】[Explanation of symbols]

11…トロイダル・トランスジューサ、12,13…入
力端子、14,15…出力端子、16…フェライトリン
グ・コア、17…導線、18…同調回路、19,20…
入力端子、21,22…出力端子、23…バルン・トラ
ンスジューサ。
11 ... Toroidal transducer, 12, 13 ... Input terminal, 14, 15 ... Output terminal, 16 ... Ferrite ring core, 17 ... Conductive wire, 18 ... Tuning circuit, 19, 20 ...
Input terminals 21, 22 ... Output terminals, 23 ... Balun transducers.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 平衡−不平衡変換用トランスジューサの
平衡側端子と基準電位点との間に、コイルとコンデンサ
とを有する同調回路を介在させるように構成してなるこ
とを特徴とする高周波トランスジューサ。
1. A high frequency transducer characterized in that a tuning circuit having a coil and a capacitor is interposed between a balanced side terminal of a balanced-unbalanced transducer and a reference potential point.
【請求項2】 前記同調回路は、前記平衡−不平衡変換
用トランスジューサの一対の平衡側端子のうち、信号レ
ベルの高い方の端子に接続されることを特徴とする請求
項1記載の高周波トランスジューサ
2. The high frequency transducer according to claim 1, wherein the tuning circuit is connected to a terminal having a higher signal level of a pair of balanced-side terminals of the balanced-unbalanced conversion transducer.
【請求項3】 前記平衡−不平衡変換用トランスジュー
サは、トロイダル・トランスジューサであることを特徴
とする請求項1または2記載の高周波トランスジュー
サ。
3. The high frequency transducer according to claim 1, wherein the balanced-unbalanced transducer is a toroidal transducer.
【請求項4】 前記平衡−不平衡変換用トランスジュー
サは、バルン・トランスジューサであることを特徴とす
る請求項1または2記載の高周波トランスジューサ。
4. The high frequency transducer according to claim 1, wherein the balanced-unbalanced transducer is a balun transducer.
JP5878393A 1993-03-18 1993-03-18 High frequency transducer Pending JPH06276045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5878393A JPH06276045A (en) 1993-03-18 1993-03-18 High frequency transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5878393A JPH06276045A (en) 1993-03-18 1993-03-18 High frequency transducer

Publications (1)

Publication Number Publication Date
JPH06276045A true JPH06276045A (en) 1994-09-30

Family

ID=13094175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5878393A Pending JPH06276045A (en) 1993-03-18 1993-03-18 High frequency transducer

Country Status (1)

Country Link
JP (1) JPH06276045A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6111465A (en) * 1996-10-09 2000-08-29 Nec Corporation Amplifying unit comprising an input transformer capable of contributing to a wider frequency band of a broadband amplifier
US6967427B2 (en) 2002-03-18 2005-11-22 Murata Manufacturing Co., Ltd. Surface acoustic wave device and communication apparatus incorporating the same
WO2010120938A2 (en) * 2009-04-14 2010-10-21 Qualcomm Incorporated Low noise amplifier with combined input matching, balun, and transmit/receive switch
CN108011167A (en) * 2016-10-31 2018-05-08 美国亚德诺半导体公司 Coupling line balun with common mode zero
US9972334B2 (en) 2015-09-10 2018-05-15 Qualcomm Incorporated Decoder audio classification
US10911016B2 (en) 2019-01-08 2021-02-02 Analog Devices, Inc. Wideband balun
US11101227B2 (en) 2019-07-17 2021-08-24 Analog Devices International Unlimited Company Coupled line structures for wideband applications

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6111465A (en) * 1996-10-09 2000-08-29 Nec Corporation Amplifying unit comprising an input transformer capable of contributing to a wider frequency band of a broadband amplifier
US6967427B2 (en) 2002-03-18 2005-11-22 Murata Manufacturing Co., Ltd. Surface acoustic wave device and communication apparatus incorporating the same
WO2010120938A2 (en) * 2009-04-14 2010-10-21 Qualcomm Incorporated Low noise amplifier with combined input matching, balun, and transmit/receive switch
WO2010120938A3 (en) * 2009-04-14 2010-12-09 Qualcomm Incorporated Low noise amplifier with combined input matching, balun, and transmit/receive switch
US8229367B2 (en) 2009-04-14 2012-07-24 Qualcomm, Incorporated Low noise amplifier with combined input matching, balun, and transmit/receive switch
JP2012524476A (en) * 2009-04-14 2012-10-11 クゥアルコム・インコーポレイテッド Low noise amplifier combined with input matching, balun, and transmit / receive switch
US9972334B2 (en) 2015-09-10 2018-05-15 Qualcomm Incorporated Decoder audio classification
CN108011167A (en) * 2016-10-31 2018-05-08 美国亚德诺半导体公司 Coupling line balun with common mode zero
CN108011167B (en) * 2016-10-31 2020-08-21 美国亚德诺半导体公司 Coupled line balun with common-mode return-to-zero
US10911016B2 (en) 2019-01-08 2021-02-02 Analog Devices, Inc. Wideband balun
US11381216B2 (en) 2019-01-08 2022-07-05 Analog Devices, Inc. Wideband balun
US11101227B2 (en) 2019-07-17 2021-08-24 Analog Devices International Unlimited Company Coupled line structures for wideband applications

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