Abstract
In this paper, a wideband-narrowband switchable tapered slot antenna (TSA) with a compact meander line resonator for an integrated microwave imaging and hyperthermia system was proposed. A compact meander line resonator, which exhibited band-pass characteristics and provided narrowband characteristics by using one PIN diode, was fabricated beneath the tapered slot of the wideband TSA to minimize the degradation of the wideband characteristics. Moreover, the electromagnetic energy was transferred to the meander line resonator with a coupling effect to ensure effective frequency switching. By adapting a PIN diode on the meander line resonator, frequency switching could be achieved. In this way, the proposed antenna could operate in a real-time frequency switching mode between the ultra-wideband (UWB; 3.1~10 GHz), which is used for microwave imaging, and the 2.45 GHz band (industrial, scientific, and medical, ISM band), which is used for microwave hyperthermia. Frequency and time-domain results proved the applicability of the proposed antenna to an integrated breast cancer detection and treatment system.
Highlights
The Electrical and Electronic Engineering Department, Yonsei University, Seoul 03722, Korea; Abstract: In this paper, a wideband-narrowband switchable tapered slot antenna (TSA) with a compact meander line resonator for an integrated microwave imaging and hyperthermia system was proposed
To verify the resonator characteristics, a radio frequency (RF) signal was induced between the vertical slot on the ground plane, and the coupling energy was induced to the resonator on the top layer
The results suggested that the of PIN diodes as well as the smallest electrical size for the narrowband structure
Summary
The system consisted of an external microwave radiator with an artificial cylindrical breast phantom. All simulation and experimental results were based on the configuration of Figure 1. To verify the electromagnetic effects of the proposed antenna on the human body, an artificial breast phantom was formed with homogeneous material that takes into account the fatty component (εr = 5.14, σ = 0.137 S/m) of the human breast [18]. The external radiator was in direct contact with the breast phantom to achieve maximum electromagnetic wave transmission
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