| dc.description.abstract | This thesis presents compact triplexer and diplexing tri-band Wilkinson power divider based on substrate integrated waveguide half-mode resonator. The proposed triplexer and power divider respectively utilize a substrate integrated waveguide half-mode triple-mode and a dual-mode resonator as the first order resonant cavity. By properly giving the length and width of the resonator, the first three modes of the resonator would be TE101、TE301 and TE102 mode. For the triplexer, the operating frequencies of TE101 and TE301 mode, which are controlled by the width and length of the resonator, are at 3 GHz and 4.5 GHz, and by utilizing perturbation slot at the top metal layer, the operating frequency of TE102 mode can be controlled individually, which is designed at 3.75 GHz. The triplexer features compact size and good stop band performance by combining half-mode and quarter-mode cavity. On the other hand, the proposed diplexing power divider utilize the first two modes, TE101¬ and TE301, which are operating at 3 GHz and 4.5 GHz, respectively. By the structure of single input and double output which implement the power division at both channel, and by placing resistors of 100-ohm between output ports to obtain good in-band isolations. Finally, by adding bandstop resonators at the second channel to introduce an extra transmission zero, it separates the single-band response at the higher frequency into a dual-band response to implement a diplexing tri-band power divider, which features a component of single layer of multi-functional combination. Three passbands are located at 3 GHz、4.25 GHz and 4.55 GHz, respectively. A transmission zero is set to be at 4.4 GHz. To validate the design concept, the proposed triplexer and power divider are designed, fabricated and measured. | en_US |