A compact semi-dumbbell slot resonator
| Autor: | Li-Jung Hsu, Chien-Jen Wang, Jhong-Wei Wu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Dielectric resonator antenna business.industry 020208 electrical & electronic engineering Bandwidth (signal processing) 020206 networking & telecommunications 02 engineering and technology Resonator Optics 0202 electrical engineering electronic engineering information engineering Miniaturization Dumbbell business Helical resonator Electronic circuit Ground plane |
| Zdroj: | 2016 Progress in Electromagnetic Research Symposium (PIERS). |
| Popis: | The defected-ground-structure (DGS) resonator is an important topic of design of the front-end circuit in the wireless communication systems. By etching a patterned slot in the ground plane, it can excite band-stop frequency performance [1, 2]. Generally, the conventional DGS resonator with two shorted ends and its resonated path in its fundamental mode is half a wavelength long at the operated frequency. This paper presents a simple and compact design for the DGS resonator. Compared to the conventional resonator with a half wavelength, the length of this proposed structure is only quarter-wavelength long. By utilizing the semi-ground plane, the filter achieves compactness and enhances rejection bandwidth. In our experiment, FR-4 is used as the substrate with a dielectric constant of 4.4 and a thickness of 0.8 mm, respectively. The geometrical configuration of the conventional dumbbell and proposed semi-dumbbell DGS resonators is illustrated in Fig. 1(a). A stepped-shaped open slot, which is named by the semi-dumbbell slot, is etched in the semi ground plane. The occupied areas of the dumbbell and semi-dumbbell resonators are 1.5 × 35.2mm2 and 1.5 × 17.6mm2. The size miniaturization ratio for the semi-dumbbell open-slot resonator is achieved by 50%. A comparison of the simulated transmission coefficients of the conventional dumbbell and proposed semi-dumbbell open-slot resonators is presented in Fig. 1(c). In order to compare the frequency characteristics of the two circuits, the operated frequency is set by 3.0 GHz. The measured 10- dB rejection bandwidth of the semi-dumbbell slot resonator is 2.43 GHz (2.06–4.49 GHz) wider than that (0.98 GHz, 2.56–3.54 GHz) of the dumbbell-shaped slot resonators. From the results, it is seen that rejection bandwidth of the semi-dumbbell open-slot resonator is extended. The bandwidth enhancement for the proposed semi-dumbbell open-slot resonator may result in the utilization of the semi-ground plane. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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