Recently, various structures such as zeroth order antennas, dual band branch line couplers, compact ring hybrids, broadband baluns, and so on, have been introduced by using metamaterial transmission lines (MTM TLs) of the composite right/left handed (CRLH) or the LC loaded (LCL) lines [1-2]. In general, most of passive circuits in RF/microwave systems are designed by using -90 or -180 phase s...

The 4:1 equal-delay transformer/balun integral to some impulse radiating antenna (IRA) designs is analyzed including the effects of non-commensurate constituent transmission lines. Specifically, we develop a 2-port Thévenin equivalent source representation of the feed structure that is compatible with most numerical simulations. It is shown that the non-commensurate nature of the balun manifest...

A BALUN transformer converts impedance into another one and also an unbalanced line a balanced line. compact size broadband is designed using Klopfenstein taper approach to transform 50Ω 100 Ω. The results of the conventional are compared with proposed BALUN. In order reduce length BALUN, curved microstrip used. 56 %- 70 % smaller in w.r.t but at cost 6% - 11% reduction overall band. has me...

This paper presents a semi-lumped balun transformer using conventional PCB process and its design theory and geometry for the maximally flat response and wide bandwidth using magnetically coupled LC resonators. The proposed balun is comprised of two pairs of coupled resonators which share one among three LC resonators. It provides an identical magnitude and phase difference of 180° between two ...

W hy all the mystery surrounding baluns? Here’s some straight talk to dispel the rumors! The balun — to use, or not to use — is one of today’s hottest topics in Amateur Radio. Because certain aspects of the connection between a coaxial feed line and a balanced antenna have been ignored, misunderstanding still exists concerning the function of baluns. Many commercial baluns embody some form of i...

A new design and experimental results of a microstripfed ultra-wideband Fermi antenna at millimeter-wave frequencies are presented. By utilizing a new microstrip-to-CPS balun (or transition), which provides wider bandwidth than conventional planar balun, the design of microstrip-fed Fermi antenna is greatly simplified. The proposed Fermi antenna demonstrates ultra-wideband performance for the f...

A new shaped circularly polarized dielectric resonator antenna (CP DRA) is studied with branch-line coupler and log-periodic balun for the GPS application. Since the coupler and balun are located under the DRA, it does not increase the footprint of the antenna, as a result the system is very compact. Two configurations are considered in this paper. In the first configuration, an external 50Ω lo...

Abstract Balun has been widely used for microwave circuits its balance properties. The development of highly integrated RF systems put forward higher requirements superior performance and miniaturization the balun. A compact broadband millimeter wave (MMW) transformer balun based on through silicon via (TSV) technology is proposed in this letter. Compared with traditional balun, impedance ratio...

Rick Sturdivant Hughes Aircraft Company El Segundo, California aluns find wide use in mixer, antenna and balanced amplifiercircuits. Yet balun design is still regarded as if i t were black magic by many engineers, partly due to the fact that practical design information on baluns can be difficult to find. However, many good baluns have been developed over the years and somc are surprisingly sim...

1. Abstract In this design, the dual band dipole antenna feed network with wide bandwidth tapered microstrip balun is studied. The design and experimental results of low profile embedded microstrip dipole antenna with tapered microstrip balun shows fairly good performances. The feed network of the design with wider bandwidth and lower power loss tapered microstrip line to overlap coplanar strip...