.. 標題：毫瓦到 dBm 轉換器
.. slug：射頻毫瓦到 DBM
.. 日期: 2025-12-26 15:00:00 世界標準時間
..標籤：網路、計算機、工具、射頻、無線、dbm
..類別：計算器
..連結：
.. 描述：毫瓦 (mW) 與 dBm 之間的相互轉換。對於處理 WiFi 傳輸功率電平、電纜損耗測量和 RF 鏈路預算計算至關重要。
..類型：文字
<style>
    .calc-container {
        max-width: 1000px;
        margin: 20px auto;
        padding: 20px;
    }

    .calc-header {
        margin-bottom: 30px;
        padding: 25px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 12px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        color: white;
    }

    .calc-header h2 {
        margin-top: 0;
        color: white;
        font-size: 28px;
        margin-bottom: 10px;
    }

    .calc-header p {
        margin: 10px 0;
        opacity: 0.95;
        font-size: 15px;
    }

    .input-group {
        display: flex;
        gap: 10px;
        margin-top: 20px;
        align-items: flex-end;
    }

    .input-field {
        flex: 1;
    }

    .input-field label {
        display: block;
        margin-bottom: 8px;
        font-weight: bold;
        font-size: 14px;
    }

    .input-field input {
        width: 100%;
        padding: 14px;
        font-size: 16px;
        border: 2px solid rgba(255,255,255,0.3);
        border-radius: 6px;
        font-family: 'Courier New', monospace;
        background: rgba(255,255,255,0.95);
        transition: all 0.3s ease;
        box-sizing: border-box;
    }

    .input-field input:focus {
        outline: none;
        border-color: #4CAF50;
        background: white;
        box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
    }

    .calc-btn {
        padding: 14px 35px;
        font-size: 16px;
        background: #4CAF50;
        color: white;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-weight: bold;
        transition: all 0.3s ease;
        box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    .calc-btn:hover {
        background: #45a049;
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    }

    .calc-btn:active {
        background: #3d8b40;
        transform: translateY(0);
    }

    .result-section {
        background: white;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        margin-top: 30px;
        overflow: hidden;
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        transition: all 0.3s ease;
    }

    .result-section:hover {
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }

    .section-header {
        background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
        color: white;
        padding: 15px 20px;
        font-size: 18px;
        font-weight: bold;
    }

    .section-content {
        padding: 20px;
        background: #fafafa;
    }

    .data-row {
        display: flex;
        margin: 12px 0;
        padding: 10px;
        background: white;
        border-radius: 4px;
        border-left: 3px solid #4CAF50;
    }

    .data-label {
        font-weight: bold;
        color: #555;
        min-width: 280px;
        flex-shrink: 0;
    }

    .data-value {
        color: #333;
        font-family: 'Courier New', monospace;
        word-break: break-word;
    }

    .data-value.highlight {
        color: #4CAF50;
        font-weight: bold;
        font-size: 18px;
    }

    .help-text {
        margin-top: 15px;
        font-size: 14px;
        color: rgba(255,255,255,0.9);
        background: rgba(0,0,0,0.1);
        padding: 10px 15px;
        border-radius: 4px;
    }

    .help-text strong {
        color: white;
    }

    /* Responsive design */
    @media (max-width: 768px) {
        .input-group {
            flex-direction: column;
        }

        .calc-btn {
            width: 100%;
        }

        .data-row {
            flex-direction: column;
        }

        .data-label {
            margin-bottom: 5px;
            min-width: auto;
        }
    }
</style>
<div class="calc-container">
<div class="calc-header">
<h2>毫瓦 (mW) 到分貝毫瓦 (dBm) 轉換器</h2>
<p>在處理無線系統時，供應商通常會提供不同單位的功率測量值。有些使用毫瓦 (mW)，而其他則使用分貝毫瓦 (dBm)。這種雙向轉換器可以輕鬆地在任一測量單元中工作。</p>
<div class="input-group">
<div class="input-field">
<label for="mW">毫瓦（mW）：</label>
<input id="mW" type="text" value="0"/>
</div>
<div class="input-field">
<label for="dBm">分貝毫瓦 (dBm)：</label>
<input id="dBm" type="text" value="0"/>
</div>
<button class="calc-btn" onclick="mWtodBmorreverse()" type="button">轉變</button>
</div>
<div class="help-text">
<strong>使用方法：</strong>在任一欄位中輸入一個值，然後按一下「轉換」。該工具將同時計算這兩種轉換。</div>
</div>
<div class="result-section" id="results" style="display: none;">
<div class="section-header">轉換結果</div>
<div class="section-content">
<div class="data-row">
<div class="data-label">毫瓦 (mW) 到 分貝毫瓦 (dBm)：</div>
<div class="data-value highlight" id="mWtodBm">-</div>
</div>
<div class="data-row">
<div class="data-label">分貝毫瓦 (dBm) 到 毫瓦 (mW)：</div>
<div class="data-value highlight" id="dBmtomW">-</div>
</div>
</div>
</div>
</div>
<script>
function mWtodBmorreverse() {
    // Set variables from input
    var mW = Number(document.getElementById("mW").value);
    var dBm = Number(document.getElementById("dBm").value);

    var mWtodBm = 10 * Math.log10(mW/1);
    var dBmtomW = 1* Math.pow(10,(dBm/10));

    document.getElementById("mWtodBm").innerHTML = mWtodBm.toFixed(2) + " dBm";
    document.getElementById("dBmtomW").innerHTML = dBmtomW.toFixed(4) + " mW";

    // Show results section
    document.getElementById("results").style.display = "block";
}
</script>