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Electrically tunable evanescent mode half mode substrate integrated waveguide (HMSIW) resonators are implemented for S band applications. An HMSIW loaded with a complementary split ring resonator (CSRR) achieves forward electromagnetic wave transmission below the characteristic waveguide cutoff frequency due to evanescent wave amplification. A variable capacitor connected to one of the conductors...
A tunable SRR antenna is investigated both theoretically and experimentally. The proposed antenna has a variable radiation frequency from 1.81 GHz to 2.14 GHz with a tuning voltage between 0 and 9.5V. Simulated data show good agreement with measurement ones. Besides tuability, the proposed antenna has achieved a dimension reduction by 59.3 % compared with the monopole counterpart.
This paper describes the design, fabrication and test results of a family of integrated low-voltage ferroelectric phase shifters ranging in frequency of operation from 0.7 GHz to 6 GHz. All devices use a common material system of barium strontium titanate (BaxSr1-x TiO3 or BST) thin-films on a sapphire (Al2O 3) substrate. Thick copper (Cu) metallization is used to allow integration of ferroelectric...
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