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2025/04/25

SMA同軸連接器頻率範圍基礎知識|支援5G、雷達、量測等應用

SMA同軸連接器頻率範圍基礎知識|支援5G、雷達、量測等應用

 

SMA同軸連接器頻率範圍基礎知識|支援5G、雷達、量測等應用

 

為什麼頻率範圍是選擇SMA連接器的關鍵?

SMA(SubMiniature version A)同軸連接器是目前最常見的高頻RF連接器之一,廣泛應用於無線通訊、測試儀器、雷達系統與5G應用。

一般而言,標準SMA連接器支援DC至18GHz,但有些高性能版本可以延伸至26.5GHz甚至更高。

本篇文章將帶你一次了解SMA連接器的頻率支援能力、設計因素與應用對應需求,協助你選出最適合的型號。

 

延伸閱讀推薦:

《5分鐘快速認識SMA系列連接器》|新手也能快速掌握SMA結構與應用

 

 

1. 標準SMA連接器的頻率範圍:DC至18GHz

多數市售SMA連接器設計可穩定支援 DC到18GHz 的頻率範圍,關鍵設計要素包括:

  • 內部結構設計:高頻訊號傳輸仰賴精密的幾何結構與介電材料。
  • 導電材質選擇:鍍金接點能減少訊號損耗,並延長耐用性。
  • 阻抗匹配:50Ω的阻抗設計,有助降低回波損耗(Return Loss)與反射,提高訊號完整性。

這樣的設計能滿足多數Wi-Fi、LTE、RF測試系統的基本需求。

 

 

2. 高頻版本SMA連接器:支援到26.5GHz甚至更高

隨著毫米波、5G與雷達技術的普及,標準18GHz已無法滿足部分應用需求。高性能SMA連接器透過以下方式突破限制:

  • 頻率延伸至26.5GHz或更高:適用於毫米波雷達、5G基地台與先進測試系統。
  • 使用高精度製造工藝:減少機械誤差,提高高頻響應穩定性。
  • 選用低損耗材料(如PTFE):可降低訊號衰減,提升整體效能。
  • 接觸結構優化:保持在高頻段下仍具穩定連接與低損耗表現。

 

 

3. 不同應用對SMA頻率範圍的需求分析

選擇適當的SMA連接器,不僅是規格匹配,更是確保系統效能的關鍵,不同應用場景對於頻率能力有不同要求,以下為常見情境:

應用類型 頻率範圍需求 SMA連接器特性需求
無線通訊(Wi-Fi、5G) 約2GHz ~ 6GHz 低插入損耗、穩定阻抗
衛星通訊、雷達系統 約12GHz ~ 30GHz 高頻響應佳、抗干擾
測試與量測設備 18GHz以上 低反射損耗、高精度結構

 

比較延伸:

想了解SMA與SMB哪裡不同?《SMA VS. SMB 連接器比較:快速認識4大關鍵》

 

 

4. 影響SMA連接器頻率性能的關鍵因素

想要SMA連接器在高頻下保持穩定傳輸?這些細節不能忽略:

  • 接觸點設計品質:接觸不良或偏心會造成訊號反射與衰減。
  • 介電材料選用:PTFE、PEEK 等低損耗材料可顯著降低訊號流失。
  • 製造公差控制:更高精度的加工等於更好的頻率響應與一致性。

 

 

結語:依應用選對SMA連接器,才能發揮高頻效能

SMA同軸連接器的頻率支援能力,來自於其設計精度、材料選擇與製造技術的綜合成果。

若應用在5G、雷達、量測儀器等高頻領域,選擇26.5GHz等級的高性能SMA連接器將是確保訊號品質與系統穩定的關鍵。

佳楠提供多種標準與高頻版本SMA連接器,適用於不同頻段與應用場景,歡迎聯繫我們了解更多技術細節與選型建議。

 

精選商品連結

🔗 SMA同軸連接器產品總覽

🔗 SMA 27GHz高頻連接器推薦

 

尋求技術建議或選型協助?

歡迎聯繫佳楠顧問團隊:service@chinnan.com.tw

 


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