摘要
目的:针对超宽带微波检测的需要,研制了一种可用于早期乳腺癌检测应用的超宽带微波探头。方法:利用微波检测早期乳腺癌具有相对简便、安全、准确、费用低、便于常规普及等优点,使用超宽带微波检测技术,可以兼顾早期乳腺癌检测所需的高成像分辨率和高灵敏度要求。采用指数渐变TEM喇叭配以角锥背腔结构。TEM喇叭结构保证探头的超宽带特性,角锥背腔结构有助于减小背向和侧向辐射泄漏。另外,该探头设计中还配以电阻加载回路以增强天线探头的低频微波辐射能力,并辅以匹配介质块,进一步拓展工作带宽。结果:该探头结构紧凑,利用美国Agilent矢量网络分析仪E8362B对该探头进行了测试,结果表明该探头的-10dB带宽范围为1.36～20GHz。结论:该探关具有超宽带工作特性,可以满足超宽带微波早期乳腺癌检测及其他超宽带微波近场探测的需要。
Objective Ultra-wideband （UWB） microwave imaging is one of the promising alternatives for breast tumor detection, which can provide the desired high resolution and high sensitivity. Methods For UWB microwave early breast tumor detection, a UWB antenna with small size and compact structure is generally desired. To meet the demands of UWB microwave imaging and detection, a novel compact UWB probe is developed and tested. The probe is a combination of an exponentially-flared TEM horn and a pyramidal back-cavity, where the pyramidal back-cavity is employed to block back and side radiation. To increase the operation bandwidth, a low-frequency compensation loop loaded with resistors and a dielectric material block at the throat of TEM horn are added to the probe. Results The compact probe is fabricated and tested by vector network analyzer E8362B, and the results demonstrate an operation frequency band ranging from 1.36GHz to 20GHz for return loss under -10dB. Conclusion The probe can meet the needs of UWB microwave imaging for the early breast tumor detection.
出处
《医疗卫生装备》
CAS
2008年第10期7-9,共3页
Chinese Medical Equipment Journal
基金
江苏省高校自然科学基金项目(05KJB510012)
关键词
乳腺癌
超带宽天线
探头
breast tumor
uhra-wideband （UWB） antenna
probe
作者简介
李艳茹（1981-），女，内蒙古赤峰人，硕士研究生，主要研究方向为超宽带探测与成像技术，Email：yanruli_cp@163.com
来欣，高级工程师．主要从事RFID和超宽带技术在后勤应用方面的研究工作。
