Title :
LSE-mode balun for hybrid integration of NRD-guide and microstrip line
Author :
Bacha, Abdallah ; Wu, Ke
Author_Institution :
Dept. de Genie Electr., Ecole Polytech. de Montreal, Que., Canada
fDate :
5/1/1998 12:00:00 AM
Abstract :
A recently proposed hybrid integration technology of NRD-guide and planar circuits provides an alternative for exploiting advantageous features of the two complementary structures in view of three-dimensional circuit design at millimeter-wave frequencies. Such an integration scheme has been developed for use of the second fundamental mode (LSM) having the lowest transmission loss. In this work, a new balun structure (transition) integrating NRD-guide and microstrip line is reported for the first fundamental mode (LSE). A TLM algorithm is used to model and optimize the proposed LSE-mode related NRD-guide/microstrip line transition. Electrical characteristics of the new balun are studied theoretically and experimentally. Calculated and measured results are found to be in good agreement for designed experimental prototypes at 18-22 GHz
Keywords :
baluns; microstrip circuits; microstrip lines; microwave integrated circuits; millimetre wave integrated circuits; nonradiative dielectric waveguides; 18 to 22 GHz; LSE-mode balun; NRD-guide; TLM algorithm; electrical characteristics; first fundamental mode; hybrid integration; microstrip line; millimeter-wave frequencies; three-dimensional circuit design; transition; transmission loss; Circuit synthesis; Coplanar waveguides; Electric variables; Etching; Geometry; Impedance matching; Microstrip; Propagation losses; RF signals; Radio frequency;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
