Using phase relations in microstrip directional couplers to achieve high directivity
IEEE Transactions on Microwave Theory and Techniques
4063 - 4071
MetadataShow full item record
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/20705
We analyze the microstrip directional couplers with a special focus on the phase difference between the coupled and isolated ports. The analysis uses the even-odd mode decomposition technique and network theory. The results show that the phase difference between the signals at the coupled port and the isolated port is close to \pi in a very wide band. This property can be used to achieve a broadband directivity by inducing a voltage cancellation at the isolated port of the couplers. Two different cancellation methods are investigated. Analytical formulas for the required component values of both methods are given. Higher directivity can be obtained at the expense of reduced bandwidth.
Showing items related by title, author, creator and subject.
New techniques to design performance improved power dividers and directional couplers using the new scattering parameter relations Taş, Vahdettin (Bilkent University, 2015)Wide bandwidth provides with several benefits in RF applications such as enabling high data rates for communication applications, enhancing the multi tread avoiding capabilities of the jamming systems, improving the ...
Yurt, Nasuhi (Bilkent University, 1997)Directional couplers are building blocks for m any guided wave devices in integrated optics and optoelectronics. They have been used as switches, modulators, wavelength filters, power dividers, wavelength m ultiplexer-dem ...
Kiyat, İsa (Bilkent University, 2000)Silicon-on-insulator(SOI) optical waveguides, directional couplers and some types of MMI couplers were designed, fabricated and characterized at a wavelength of 1.55 /im. Effective index method and the single mode ...