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2025/08/02

SMA同軸連接器適用的電纜類型|常見線材比較與應用推薦

SMA同軸連接器適用的電纜類型|常見線材比較與應用推薦 

SMA同軸連接器適用的電纜類型|常見線材比較與應用推薦

SMA連接器效能不只取決於連接器本體,選對對應應用的同軸電纜同樣關鍵。

本文介紹常見線材如 RG-316、RG-402、RG-405、Sucoflex、LDF1-50 的比較與應用建議,幫助您快速選出最合適的SMA電纜搭配。

 

 

SMA連接器專用電纜怎麼選?五大關鍵重點

SMA電纜怎麼選?以下是五大選型重點摘要,適合初步決策:

  • 頻率支援範圍:選用能涵蓋 SMA 頻率需求的電纜,避免訊號衰減與失真。
  • 插入損耗(Insertion Loss):選用插入損耗低的電纜,可以讓訊號傳得更遠、品質更穩定,特別是在 5G、毫米波等高頻應用中更為重要,因為高頻訊號對損耗特別敏感。
  • 柔性與機械特性:根據安裝空間與維修需求,挑選柔性(flexible)或半剛性(semi-rigid)電纜。柔性電纜便於佈線,半剛性電纜則穩定性更高。
  • 阻抗匹配:SMA 標準介面為 50Ω,所使用的電纜也應維持相同阻抗,以避免阻抗不連續造成的反射與回波損耗。
  • 電纜長度考量:電纜越長,插入損耗越大,頻率越高影響越明顯,因此建議選用低損耗型號並盡量縮短傳輸距離。

 

 

SMA同軸電纜類型比較表(頻率、特性與應用)

根據應用的頻率與空間條件,不同結構的電纜選擇都會影響整體訊號品質:

電纜型號 頻率範圍 柔性程度 插入損耗 應用領域
RG-316 DC – 6GHz 高柔性 中等 Wi-Fi模組、IoT、日常RF應用
RG-402 DC – 18GHz 柔性低(半剛性或剛性) 低損耗 測試儀器、雷達、航太電子
RG-405 DC – 18GHz 柔性低(半剛性或剛性) 低損耗 軍用設備、移動RF模組
LDF1-50 DC – 10GHz 柔性低(半剛性) 極低損耗 長距離傳輸、基地台饋線
Sucoflex 100 DC – 26.5GHz 中柔性 超低損耗 精密量測、航空航太系統

 

 

不同應用場景對應的建議電纜

應用場景 建議電纜 特點說明
通用 RF 通訊 RG-316 經濟實用、適合短距離或內部連接
軍用與戶外行動裝備 RG-405 高柔性與耐用度,應對劇烈環境
高頻測試 / 雷達系統 RG-402 或 Sucoflex 頻寬大、耗損低、傳輸精確
基地台或高功率發射 LDF1-50 耗損極低、支援大功率

 

 

依應用挑選電纜,才能發揮 SMA 最佳效能

選擇正確的同軸電纜,不僅能提升SMA連接器的訊號傳輸效能,更能延長系統壽命與維持穩定性。無論您是設計量測設備、通訊模組還是5G應用,提前了解不同電纜的特性將有助於做出選擇。

 

找不到含線材的SMA連接器組件嗎?

別擔心,我們也提供SMA連接器+線材的組裝服務,先從選擇適合的SMA連接器開始

 

 

常見問答|SMA 同軸電纜選擇 Q&A

  1. SMA 接頭是否可以與 75Ω 電纜搭配使用?
    不建議。SMA 設計為 50Ω 阻抗,若與 75Ω 電纜混用,將造成阻抗不匹配,導致回波損耗增高與訊號衰減。建議維持一致的 50Ω 系統設計。
     
  2. 半剛性與高柔性電纜哪個比較適合機櫃內安裝?
    若安裝空間有限、彎曲路徑多,建議使用如 RG-316 的高柔性電纜,便於佈線與維修;但若重視低損耗與穩定性,如 RG-405 的半剛性電纜更適合用於高頻、精密設備。
     
  3. Sucoflex 是哪類應用最常見的 SMA 適配電纜?
    Sucoflex 電纜具備超低損耗與高頻支援(至 26.5GHz),常見應用於 量測儀器、雷達模組、航空航太系統,尤其適合精密射頻量測與高可靠性要求的場景。

 

聯絡我們|需要技術諮詢或專業客製服務?

歡迎聯絡我們:service@chinnan.com.tw

 

延伸閱讀更多SMA連接器與射頻應用

 


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