| Autor: |
Rahman, Atiqur, Sarkar, Pankaj |
| Předmět: |
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| Zdroj: |
International Journal of Microwave & Optical Technology; May2024, Vol. 19 Issue 3, p290-296, 7p |
| Abstrakt: |
In this paper, a third order tunable bandpass filter using substrate integrated waveguide (SIW) topology is presented. A cross shaped slot is etched on the top surface of the SIW cavity structure to implement the passband from 4.6 - 5.1 GHz. The novel cross shaped slot is designed smartly on the top of the SIW cavity to achieve 3rd order bandpass filter characteristics without increasing the dimension of the cavity. By placing the cross shaped slot at an offset of 1.0 mm from the center of the cavity structure, a transmission zero is created on the upper side of the passband. Presence of transmission zero increases the selectivity of the propose structure and accomplish an upper wide stopband characteristic. Two varactor diodes are loaded using the radial stubs on the top plane to produce tunable passband characteristics. The centre frequency of the passband is tuned over a bandwidth of 600 MHz by properly applying the bias voltage. An equivalent circuit is presented in order to understand the working of the filter. To confirm the simulated results, the proposed filter is fabricated and measured. The simulated results are agreed well with the measured results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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