製品概要
概要
In combination with the application note "ST25R95 RF transceiver antenna tuning circuit with EMI filter", STSW-ST25R003 worksheet helps customers to calculate and adjust the antenna tuning circuit for the ST25R95 NFC / RFID reader.
STSW-ST25R003 allows to estimates the theoretical circuit component values to achieve the desired input impedance of the tuning circuit.
From chosen and calculated component values, the input impedance curve is given as a function of the frequency for comparison and adjustment of component values on the application board.
STSW-ST25R003 also estimates the voltages at different location of the circuit.
An estimation of the magnetic field strength generated by the reader at various distance (free space, reader not loaded by any tag) is also provided.
A Smith chart with 50 Ω reference impedance is provided for tuning circuit input impedance trimming from 10 to 20 Mhz.
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特徴
- ST25R95 antenna tuning calculation tool including EMI filter
- Tuning circuit input impedance curve drawing
- Tuning circuit voltages curves calculation and drawing
- Theoretical magnetic field strength calculation and drawing
- Smith Chart plot
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製品型番 | 概要 | ECCN (EU) | ECCN (US) | サプライヤ | 最新バージョン | ダウンロード |
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STSW-ST25R003 | Tool for ST25R95 EMI filter calculation | NEC | EAR99 | ST | 1.0 | x ソフトウェア入手 お客様の登録を正常に受け付けました。 サーバへのリクエストに失敗しました。しばらくしてから再度お試しくださいmy.st.comのアカウントをお持ちの場合は、ログイン後、認証手続きなしでソフトウェアをダウンロードできます。 ログインを希望されない場合でも、お名前とメールアドレスを下のフォームに入力すれば、ソフトウェアをダウンロードできます。 これにより、STはお客様への継続的な情報提供が可能となり、本ソフトウェアの更新についてお知らせすることができます。 さらにダウンロードを続ける場合、多くのソフトウェアについては、この手順をもう一度行う必要はありません。 お客様のメールアドレスを認証し、ダウンロードを開始するため、届いたメール内のリンクをクリックしてください。 このリンクは24時間有効です。 メールの受信を確認できない場合は、迷惑メールのフィルタを確認してみてください。 x お客様の登録を正常に受け付けました。 お客様のメールアドレスを認証し、ダウンロードを開始するため、届いたメール内のリンクをクリックしてください。 このリンクは24時間有効です。 メールの受信を確認できない場合は、迷惑メールのフィルタを確認してみてください。 x お客様のメールアドレスはまだ認証されておりません。 ダウンロード時にご入力いただいたメールアドレスは、まだ認証されておりません。 ダウンロード・リンクが記載されたメールが届いていないか受信箱をご確認ください。 メールが届いていない場合、または誤ったアドレスを入力した場合は操作をやり直すことができます。 x About Requesting Software
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