Integrated active antenna using annular ring microstrip antenna and gunn diode

Miller, Richard E.; Chang, Kai

doi:10.1002/mop.4650040205

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2007

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“…Microstip ring resonators are widely used applications in communication circuits such as in mixer [1], antenna [2], oscillator [3], and bandpass filter (BPF) [4]- [9]. Especially in ring BPFs, most of the designed BPFs have been realized with dual-mode response [4]- [9] due to its simple design, compact size, and narrow bandpass response, which is used to pass the wanted signal and reject the unwanted signal in the communication systems.…”

Section: Introductionmentioning

confidence: 99%

New Dual-Mode Ring Bandpass Filter Using Symmetrical Left-Handed Transmission Line

Srisathit

Jadpum

Bunnjaweht

et al. 2007

2007 Asia-Pacific Microwave Conference

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This paper presents a new dual-mode microstrip ring bandpass filter (BPF) based on the left-handed transmission line (LH-TL). To achieve dual-mode response, a high impedance LH-TL can easily be realized to perturb a pair of degenerate modes, which difficulty is realized in the conventional dual-mode ring filter. The proposed BPF is designed and fabricated on an FR-4 substrate to suit the 2.45GHz ISM band application with a fractional bandwidth of 16.2 percentages. Across the bandwidth, the measured insertion loss is less than 1.5dB, whereas the input and output return losses are better than 20dB from 2.37 to 2.59GHz. The measured results are in good agreement with the simulated results.

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Section: Introductionmentioning

confidence: 99%