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The simulated reflection coefficient of the chip antenna is below the -10 dB standard for the frequency range of 99.3 - 114.8 GHz, reaching its lowest resonance at 108 GHz with a reflection coefficient of -30.6 dB. Measured data indicates a bandwidth between 91.1 GHz and 107.1 GHz, with the lowest resonance point at 100 GHz and a reflection coefficient of -22.1 dB. Due to the limitations of the vector network analyzer (VNA) used, which has a frequency range of 2 - 110 GHz, measurements beyond 110 GHz were not possible and are not included in the graph. The measured lowest resonance point shows better results compared to the simulation. However, there is a frequency offset towards lower frequencies in the measured results, attributed to fabrication limitations. Despite this, the overall trend of the measured results closely matches the simulated values, suggesting that the performance beyond 150 GHz would also align with the simulations. The antenna demonstrates a gain of approximately -5 dBi to -4 dBi, with a gain of -4.6 dBi at the resonance point of 108 GHz, as illustrated in Fig. |
IEEE/ICACT20240052 Slide.11
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