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In this contribution, a simple but highly sensitive biosensor based on microstrip ring-resonator is presented for tissues moisture evaluation. By incorporating high impedance ring, tight and enhanced coupling mechanism the proposed 1 GHz ring-resonator demonstrates significant change in the resonance frequency than normal resonator. Simulated and measured results are in good agreement. The proposed...
A design procedure for fourth and sixth order ultra-wide band filter using step impedance resonators (SIR) is presented in this paper. SIR provides wide degree of freedom in structures and capable of handling wide frequency band. Due to these features and its simpler structure, it gives many possibilities for practical applications. In this paper, transfer function is extracted from equivalent circuit...
A quasi-elliptic triple-mode resonator filter is proposed in this paper. The filter is realized by having a capacitive coupling between the input and the output of a proposed triple mode resonator with one transmission zero at the high side of the passband. With the mentioned coupling, additional two transmission zeros are obtained at both sides of the passband which yields a quasi-elliptic response...
Conventional dual mode filters are realized by perturbing the electromagnetic field of ring resonator structures such that two orthogonal resonant modes occur, yielding a dual mode response. Due to the inherent resonant characteristic, the electrical length needed to establish the resonant condition is 360°. However it is felt that the size is still too large and unacceptable for the design of high...
Dual mode filters have been widely used in wireless communications systems due to their advantageous of being small size, planar and low loss. Most of the dual mode filters are realized based upon dual mode ring or patch resonator such that the two orthogonal resonant modes occur, yielding a dual mode response. However the electrical length needed to establish the resonant condition is still considerably...
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