JPH0453073Y2 - - Google Patents
Info
- Publication number
- JPH0453073Y2 JPH0453073Y2 JP1987039933U JP3993387U JPH0453073Y2 JP H0453073 Y2 JPH0453073 Y2 JP H0453073Y2 JP 1987039933 U JP1987039933 U JP 1987039933U JP 3993387 U JP3993387 U JP 3993387U JP H0453073 Y2 JPH0453073 Y2 JP H0453073Y2
- Authority
- JP
- Japan
- Prior art keywords
- diode
- coil
- capacitor
- power supply
- circuit
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Transceivers (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、無線機におけるアンテナの送・受信
切換スイツチの改良に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a transmission/reception switching switch for an antenna in a radio device.
特に携帯型無線機では、送・受信におけるアイ
ソレーシヨンの方式により電池の使用時間を延ば
して携帯使用の益が一層高まる。 Particularly in portable radios, the isolation method used in transmission and reception extends battery usage time, further increasing the benefits of portable radio equipment.
従来のRXノツチフイルタータイプのアンテナ
スイツチ回路は、第２図のように、送信時に接続
される電池TXBとアースとの間に直列状態で働
く２個のダイオードD3，D4を用い、ダイオード
間に設けたコイル５とコイル７を接続し、アース
された並列の抵抗ＲとコンデンサＣをダイオード
D4の出力端に接続したものである
受信回路部RXの入力端は前記コイル５とコイ
ル７の中間点に接続し、アンテナANTは前記ダ
イオードD3とコイル５の中間に接続される。コ
イル７とコンデンサＣにより送信部TX周波数の
ノツチフイルターを形成し、受信回路部RXと送
信回路部TXとの所要のアイソレーシヨンを得
た。
As shown in Figure 2, the conventional RX notch filter type antenna switch circuit uses two diodes D 3 and D 4 that operate in series between the battery TXB connected during transmission and the ground. Connect coil 5 and coil 7 provided in
The input end of the receiving circuit RX is connected to the output end of D4.The input end of the receiving circuit RX is connected to the midpoint between the coils 5 and 7, and the antenna ANT is connected to the midpoint between the diode D3 and the coil 5. The coil 7 and the capacitor C form a notch filter for the transmitting section TX frequency, and the required isolation between the receiving circuit section RX and the transmitting circuit section TX is obtained.
上記従来例は、ダイオードが２本直列に入つて
アースされるようにしたことから、電圧降下がダ
イオード２本分になる。その為この回路に入つて
いく電力の大部分が抵抗Ｒで消費され無駄な熱に
変わるだけである。この無駄な電力消費は無くす
必要がある。
In the conventional example, two diodes are connected in series and grounded, so the voltage drop is equal to the voltage drop of two diodes. Therefore, most of the electric power that enters this circuit is consumed by the resistor R and turns into wasted heat. This wasteful power consumption needs to be eliminated.
本考案は、送信部TX出力端とアンテナANT
間にダイオードD1を接続し、前記アンテナANT
と前記ダイオードD1との中間点にアース接続コ
ンデンサC2、コイルL4を並列に接続し、該コイ
ルL4に逆向きにダイオードD2を接続すると共に
このダイオードD2にアースしたコンデンサC1を
接続し、前記コイルL4とダイオードD2の中間点
に受信部RXの入力端および内部回路RFを接続
し、電源TXBの電力供給端を前記ダイオードD1
および前記ダイオードD2とコンデンサC1との中
間点にそれぞれ接続し前記コンデンサC2とコイ
ル４によりλ／４アイソレーシヨンを形成するこ
とを特徴とする低消費電力形アンテナスイツチで
あつて、上記問題点を解決した。
This invention consists of transmitter TX output end and antenna ANT
Connect a diode D1 between the antenna ANT
A grounded capacitor C 2 and a coil L 4 are connected in parallel to the intermediate point between the diode D 1 and the diode D 1 , a diode D 2 is connected in the opposite direction to the coil L 4 , and the capacitor C 1 is grounded to the diode D 2 . The input end of the receiver RX and the internal circuit RF are connected to the midpoint between the coil L 4 and the diode D 2 , and the power supply end of the power supply TXB is connected to the diode D 1 .
and a low power consumption type antenna switch, which is connected to an intermediate point between the diode D 2 and the capacitor C 1 , respectively, and forms λ/4 isolation with the capacitor C 2 and the coil 4. Solved the problem.
送信時は、電源TXBの電力が供給されて、ア
ンテナANTに向う電流は第１図において抵抗R1
−コイルL1−ダイオードD1−コンデンサC2、コ
イルL4−コイルL3に流れ、ダイオードD1がONす
る。これにより送信部TXとアンテナANT間が
導通する。同時に、電源TXB−抵抗R2−コイル
L2−ダイオードD2−コイルL3に流れる電流がダ
イオードD2をONする。電源に対して並列に接続
したダイオードD1，D2の導通とともに、コイル
L4とコンデンサC2がλ／４を形成して、送信部
TXと受信部RX間のアイソレーシヨンをとる。
また、コイルL3の電位は、電源TBXに対して１
本のダイオードD1またはD2の電圧降下にとどま
る高電位であつて、ここでは内部回路のラジオ周
波数（RF）ハイブリツト・ドライバー回路RFに
その高電圧を負荷する。例えば電源TXBが7.2V
の電池の場合、ダイオードD1又はD2が通常0.7V
の電圧降下を示すから、上記ドライバー回路RF
には6.5Vを作用させることが出来る。6.5Vは通
常の回路を動作させるに十分な電圧である。
During transmission, power is supplied from the power supply TXB, and the current flowing to the antenna ANT is connected to the resistor R 1 in Figure 1.
The current flows through - coil L 1 - diode D 1 - capacitor C 2 , coil L 4 - coil L 3 , and diode D 1 is turned on. This establishes conduction between the transmitter TX and the antenna ANT. At the same time, power supply TXB − resistor R 2 − coil
The current flowing through L 2 - diode D 2 - coil L 3 turns on diode D 2 . Along with conduction of diodes D 1 and D 2 connected in parallel to the power supply, the coil
L 4 and capacitor C 2 form λ/4, transmitting section
Provides isolation between TX and receiver RX.
Also, the potential of coil L3 is 1 with respect to power supply TBX.
A high potential that remains at the voltage drop of the main diode D1 or D2 , and here loads the high voltage into the radio frequency (RF) hybrid driver circuit RF of the internal circuit. For example, power supply TXB is 7.2V
For batteries, the diode D 1 or D 2 is typically 0.7V
Since the above driver circuit shows a voltage drop of RF
6.5V can be applied to. 6.5V is enough voltage to operate normal circuits.
受信時は、電源TXBの電力は供給されず、上
記ダイオードD1をOFFにする。これによりアン
テナANT−受信部RXが導通し、受信を保持す
る。 During reception, power from the power supply TXB is not supplied and the diode D1 is turned off. As a result, the antenna ANT and the receiving section RX are brought into conduction and reception is maintained.
上記抵抗R1，R2はダイオードD1またはD2に流
れ込む電流をバランスさせるために使用し、数Ω
程度である。 The above resistors R 1 and R 2 are used to balance the current flowing into the diode D 1 or D 2 , and are several Ω.
That's about it.
本考案のアンテナスイツチは、上記回路特性に
よつて従来の制限が解消される。第２図の抵抗Ｒ
による電力消費を制御できないから、その代わり
の手段として電池電源TXBの消耗時間を延ばす
為にアンテナスイツチの電流を極力抑える方法を
取らざるを得ず、これが所要の性能を出すための
技術的制約となつていた。本考案のアンテナスイ
ツチでは、その電力を内部回路の動作に利用する
方式にし、電流を増加しても無線機の電力を無駄
に消費する結果とならないから、所要性能に必要
な付帯設計条件が緩和されて回路コストを下げる
ことができる上に、従来以上にするための高性能
化を図ることができる。 The antenna switch of the present invention overcomes the conventional limitations due to the above circuit characteristics. Resistance R in Figure 2
Since it is not possible to control the power consumption by I was getting used to it. In the antenna switch of this invention, the power is used to operate the internal circuit, and even if the current is increased, the power of the radio is not wasted, so the incidental design conditions necessary for the required performance are eased. In addition to reducing circuit costs, it is also possible to achieve higher performance than ever before.
無線機電源に並列に接続した２本のダイオード
は、送信・受信間のアイソレーシヨンのλ／４位
相差を形成するのためにダイオード１本分の電圧
降下でそれを行う結果、アンテナスイツチのアイ
ソレーシヨンを形成した後の十分な高電圧で無線
機の内部回路を動作させることができるから、従
来熱として無駄に消費された電力を有効に使用で
きる一方、アンテナ小電流に合わせるために必要
になつた従来のコスト高周辺回路をその性能を落
とさずに合理的な回路に設計変更をする等、本考
案の改良は広汎な改良効果を付帯させる。併せて
送信時の電力消費を抑えたことで、特に携帯型無
線機の内蔵電池の使用時間を長くして、その使用
の益をより高めることができる。
Two diodes connected in parallel to the radio power supply create a λ/4 phase difference for isolation between transmitting and receiving with a voltage drop of one diode. Since the internal circuits of the radio can be operated with a sufficiently high voltage after isolation is formed, the power that would normally be wasted as heat can be used effectively, while at the same time it is necessary to match the small antenna current. The improvements of the present invention have a wide range of improvement effects, such as changing the design of conventional high-cost peripheral circuits to rational circuits without reducing their performance. In addition, by reducing power consumption during transmission, it is possible to extend the usage time of the built-in battery of the portable radio, thereby further increasing the benefits of its use.
第１図は本考案の一実施例を示す回路図で、第
２図は従来例の回路図である。
D1，D2……ダイオード、L1，L2，L3，L4……
コイル、C1，C2……コンデンサ、TX……送信
部、TXB……電源、RX……受信部、RF……内
部回路。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example. D 1 , D 2 ... Diode, L 1 , L 2 , L 3 , L 4 ...
Coil, C 1 , C 2 ... capacitor, TX ... transmitting section, TXB ... power supply, RX ... receiving section, RF ... internal circuit.
Claims (1)
ードD1を接続し、前記アンテナANTと前記ダイ
オードD1との中間点にアース接続コンデンサC2
とコイルL4を並列に接続し、該コイルL4に逆向
きにダイオードD2を接続すると共にこのダイオ
ードD2にアースしたコンデンサC1を接続し、前
記コイルL4とダイオードD2の中間点に受信部RX
の入力端および内部回路RFを接続し、電源TXB
の電力供給端を前記ダイオードD1および前記ダ
イオードD2とコンデンサC1との中間点にそれぞ
れ接続し、前記コンデンサC2とコイルL4により
λ／４アイソレーシヨンを形成することを特徴と
する低消費電力形アンテナスイツチ。 A diode D 1 is connected between the transmitter TX output end and the antenna ANT, and a capacitor C 2 is grounded at the midpoint between the antenna ANT and the diode D 1 .
and a coil L 4 are connected in parallel, a diode D 2 is connected in the opposite direction to the coil L 4 , and a grounded capacitor C 1 is connected to this diode D 2 , and the midpoint between the coil L 4 and the diode D 2 is connected. to receiver RX
Connect the input end and internal circuit RF of the power supply TXB
The power supply end of the coil is connected to the intermediate point between the diode D 1 and the diode D 2 and the capacitor C 1 , respectively, and λ/4 isolation is formed by the capacitor C 2 and the coil L 4 . Low power consumption antenna switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987039933U JPH0453073Y2 (en) | 1987-03-20 | 1987-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987039933U JPH0453073Y2 (en) | 1987-03-20 | 1987-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63149647U JPS63149647U (en) | 1988-10-03 |
| JPH0453073Y2 true JPH0453073Y2 (en) | 1992-12-14 |
Family
ID=30853565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987039933U Expired JPH0453073Y2 (en) | 1987-03-20 | 1987-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453073Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751353B2 (en) * | 1974-09-18 | 1982-11-01 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751353U (en) * | 1980-09-09 | 1982-03-24 |
-
1987
- 1987-03-20 JP JP1987039933U patent/JPH0453073Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751353B2 (en) * | 1974-09-18 | 1982-11-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63149647U (en) | 1988-10-03 |
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