| Autor: |
Shih-Cheng Lin, Pin-Yao Chiou, Yi-Ming Chen, Sheng-Fuh Chang |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
IEEE Access, Vol 6, Pp 24568-24581 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2018.2829841 |
| Popis: |
In this paper, an accurate filtenna synthesis approach is investigated and verified for achieving the expected filtering response. The load-resistance flattening technique is carried out by attaching the shunt inductive/capacitive elements to cancel the unwanted parasitic element in the antenna model. The synthesis procedure was presented for a filtenna using a planar inverted-F antenna based on parallel-coupled lines. Furthermore, to economize the circuit area, hairpin resonators are adopted to replace the straight resonators in the PCL filtenna, and a tapped-feed structure is utilized for feeding. Thorough investigation reveals that conventional tapped-line feeds based on a singly loaded resonator adopted in a generic coupled-resonator filter requires careful modification to retrieve zero-reactance at the operation frequency. For verification, two bandpass filters were designed with hairpin uniform-impedance and stepped-impedance resonators, thereby validating the practicality of the proposed impedance-transforming tapped feeds. Eventually, the load-resistance flattening and impedance-transforming tapped-feed techniques are combined for developing an accurate filtenna synthesis approach. Two filtennas taking advantage of inverted-L and slotline antennas were designed and fabricated, thus, validating the feasibility of the proposed approach. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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