ENCLOSED CYLINDRICAL THICK MICROSTRIP LINES AND THEIR USE IN A HIGH-POWER 1-N POWER DIVIDER COMBINER

Closed-form equations for the characteristic impedances of even and od d modes are given for an enclosed cylindrical microstrip line with fin ite thickness (CMSWFT) with the use of the conformal mapping technique and the available equations for microstrip lines. The enclosed struct ure is also suitable from the EMI and EMC points of view. A compact 1: 5-way, equal in phase, power divider/combiner is suitable for high-pow er applications in VHF and UVF bands. The limitations regarding the ma ximum output ports are discussed. Good performance of the power divide r confirms the theoretical procedure. (C) 1996 John Wiley & Sons, Inc.