Size reduction and radiation pattern shaping of multi-fed DCC slot antennas used in conformal microwave array hyperthermia applicators.
Size reduction and radiation pattern shaping of multi-fed DCC slot antennas used in conformal microwave array hyperthermia applicators.
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DOI：
10.1117/12.809952
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发表时间：
2009-02-23
期刊：
影响因子：
--
通讯作者：
Stauffer PR
中科院分区：
文献类型：
--
作者：
Maccarini PF;Arunachalam K;Martins CD;Stauffer PR
在浅表疾病的治疗中使用共形天线阵列可以显著增加患者的舒适度，同时增强具有不规则形状的大治疗区域的局部控制。最初，提出了一种规则方形多馈缝隙天线（双同心导体- DCC）作为阵列的基本单元。当治疗区域的轮廓是矩形时，例如在主胸部或背部区域中，方形DCC工作良好，但不适合于勾勒出沿着腋窝和颈部区域扩散的疾病。此外，随着贴片面积的增加，总功率密度降低，影响效率，从而影响用中等功率放大器（<50 W）递送必要的热剂量的能力。大量的小型高效天线是优选的，因为疾病的轮廓更精确，并且对放大器的较低功率要求与系统可靠性、耐久性、线性度和总体降低的成本相关。因此，我们开发了一套设计规则的多馈槽天线与不规则的轮廓，我们实现了一种设计，减少面积，同时增加周长的槽，从而提高天线的效率和功率密度。几个商业软件包（Ansoft HFSS，Imst Empire，SemcadX和CST Microwave Studio）进行的模拟表明，尺寸减小方法可以应用于几种形状和不同的频率。几个DCC的SAR测量使用内部高分辨率扫描系统与肿瘤等效液体体模在915 MHz（美国的浅表热疗系统）和433 MHz（欧洲）进行。将实验结果与预期的理论预测进行比较，然后使用Matlab将各种尺寸和形状的单个天线的模拟和测量图案以各种组合进行求和，以显示复杂疾病的可能治疗不规则轮廓。预期局部控制将显著改善，同时保持患者舒适度。
The use of conformal antenna array in the treatment of superficial diseases can significantly increase patient comfort while enhancing the local control of large treatment area with irregular shapes. Originally a regular square multi-fed slot antenna (Dual Concentric Conductor - DCC) was proposed as basic unit cell of the array. The square DCC works well when the outline of the treatment area is rectangular such as in the main chest or back area but is not suitable to outline diseases spreading along the armpit and neck area. In addition as the area of the patch increases, the overall power density decreases affecting the efficiency and thus the ability to deliver the necessary thermal dose with medium power amplifier (<50W). A large number of small efficient antennas is preferable as the disease is more accurately contoured and the lower power requirement for the amplifiers correlates with system reliability, durability, linearity and overall reduced cost. For such reason we developed a set of design rules for multi-fed slot antennas with irregular contours and we implemented a design that reduce the area while increasing the perimeter of the slot, thus increasing the antenna efficiency and the power density. The simulation performed with several commercial packages (Ansoft HFSS, Imst Empire, SemcadX and CST Microwave Studio) show that the size reducing method can be applied to several shapes and for different frequencies. The SAR measurements of several DCCs are performed using an in-house high resolution scanning system with tumor equivalent liquid phantom both at 915 MHz for superficial hyperthermia systems in US) and 433 MHz (Europe). The experimental results are compared with the expected theoretical predictions and both simulated and measured patterns of single antennas of various size and shapes are then summed in various combinations using Matlab to show possible treatment irregular contours of complex diseases. The local control is expected to significantly improve while maintaining the patient comfort.
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影响因子：
3.1
作者：
Myerson, RJ;Straube, WL;Taylor, ME
通讯作者：
Taylor, ME
影响因子：
6.2
作者：
MARCIAL, VA
通讯作者：
MARCIAL, VA
DOI：
10.1016/0360-3016(94)00469-2
发表时间：
1995-02-15
影响因子：
7
作者：
MOROS, EG;STRAUBE, WL;MYERSON, RJ
通讯作者：
MYERSON, RJ
影响因子：
4.6
作者：
Rossetto, F;Stauffer, PR
通讯作者：
Stauffer, PR
影响因子：
45.3
作者：
Jones, EL;Oleson, JR;Dewhirst, MW
通讯作者：
Dewhirst, MW