The marchand balun is shown in schematic form in fig. In spite of its small size, this balun is an inherently narrow band device 6. Then we will develop a marchand balun design in microwave office. To allow the marchand balun to transform between arbitrary complex impedances, three reactances should be added. Note that the via is not visible at the end of each strip for ports 2 and 3. Folded marchand balun design and validation using sonnet. Analysis and design of lumped element marchand baluns. The relations between the length of interconnected transmission line and the imbalance of marchand balun are discussed. One type of balun that is often used in microwave applications is the marchand balun. Marchand balun a wide band balun which has been used for years is the marchand balun 8j. It is based on a doublebalanced active topology gilbert cell consisting of a transconductance stage t 1,t 2 which converts the input rf voltage into current and a switching stage t 3 t 6, that.
To allow the marchand balun to transform between arbitrary complex impedances, three reactances should be. Design and optimization of broadband planar baluns and. Feb 11, 2015 this video covers the implementation of a 10 ghz rectangular patch antenna, with an inset feed in ansys hfss. Resonant frequency of the antenna10ghz relative permittivity of the substrate 2. Design and optimization of broadband planar baluns and dipole. It utilizes a ring diode structure, and the performance can be improved effectively by a modified marchand balun and utype coupled lines. The hfss antenna design kit is a standalone guibased utility which automates the geometry creation, solution setup, and postprocessing reports for over 25 antenna elements. Ansoft high frequency structure simulator tutorial the dipole antenna april 2004. For 20 metres, i started with 6 metres of wire per element, and trimmed. Burghartz department of information, technology and systems delft university of technology p. The printed version of the marchand balun is shown in its simplest form in figure 9. A balun is a circuit that converts signals from an unbalanced state to a balanced state, as might be needed within different systems. Folded marchand balun design and validation using sonnet claudio m. A primary transmission line combined both quarter wavelength sections in series, and is defined from a first input port 1 to an open end.
Balun design for planar balun design, the marchand balun 10 has been extensively adopted for its good amplitude and phase balance characteristics over a wide frequency range. Design of a broadband millimeterwave monolithic iq mixer. Compared with the conventional marchand balun and the other types of balun, the proposed topology. Q factor is around 8 width of microstrip trace is 12. The conventional basic marchand balun consists of twoquarter wavelength microstrip coupled line sections. I know that a one wavelength loop in free space should have an impedance of around 100 ohms, and the balun is a 1. Hfss is high frequency structure simulator it is high performance full wave electromagnetic field simulator 3d volumetric passive device modelling that takes advantages of familiar microsoft windows graphical user interface. The design of a wideband microstrip marchand balun. The design and simulation was performed using ansoft hfss to achieve.
An unbalancedtobalanced line transformer was first proposed by marchand in 1944. The tapered balun, in turn, is very similar to other type of coupled line baluns such as the marchand balun fig. This is a simple microstrip marchand balun that i am trying to adapt to 1. The design of a wideband microstrip marchand balun atlantis. Design of planar marchand balun for mmic applications. Design and optimization of broadband planar baluns. We present here a marchand balun design, operating at 2.
This tool allows antenna designers to efficiently analyze common antenna types using hfss and also assists new users in learning to use hfss for antenna design. A branch line balun fabricated on duroid 6006 provides 40% fbw but has extensive size and the substrate is not economical. This is derived from the coaxial balun, described by nathan marchand in 1944. The marchand balun has larger bandwidth than other types of combiners and has been used. This balun can be used for input and output matching. The simplest distributed balun is a half wavelength transmission line. Codesign of a wideband doublebalanced active mixer and.
A miniaturized wideband microstrip marchand balun is presented in the paper. Pdf analysis and design of lumped element marchand baluns. Published analyses suggest that bandwidths approach. Figure is an example of a coaxial line marchand balun. Ansys hfss with hpc for large finite antenna array design. A predesigned microstrip tapered balun used for feeding section of a spiral antenna is simulated on ansoft hfss software. So to develop a hts balun is very significant for the radio astronomy telescope receiver. I am struggling to understand the behavior of this marchand balun. Miniaturized lumpeddistributed wideband balun using. Ive introduced another current, id, which travels along the balun. High frequency structure simulator for 3d electromagenetics hfss is a platform that includes multiple simulation technologies for component or system design. In, two different type of compact balun is designed with coupled line section and impedance transformer. Mar 07, 2016 hfss microstrip patch antenna analysis and design 1. Successful simulation results are obtained and measurements of implemented balun structure are made by using an hp 8722 d vector network analyzer.
A new design procedure based on the oddeven mode method to calculate the input impedance of an asymmetric strip folded dipole antenna is presented. In real life design a tradeoff design of planar marchand balun for mmic applications e. Rfmicrowave circuits i baluns fall 2007 baluns a balun balancedtounbalanced is a transformer used to connect balanced transmission line circuits to unbalanced ones two conductors having equal and opposite potential constitute a balanced line microstrip and coaxial cables use conductors of different dimensions these are. Extension of the theory of multiband marchand baluns wideband singleband baluns 57 2. As many as six of this device can be used around any particular chip as illustrated in. An artificialtransmissionlinebased miniaturized doubly balanced.
It is based on a doublebalanced active topology gilbert cell consisting of a transconductance stage t 1,t 2 which converts the input rf voltage into current and a switching stage t 3 t 6, that switches the rf current between the two output if nodes. Hfss antenna design kit summary automates model creation for variety of common antennas. The balun configurations include lumped, distributed, or both lumped and distributed elements. Note that a quarterwave length transformer was used to match the patch to a 50 ohm feed line. I am just trying to replicate resistive network marchand balun as discussed in analysis and design of impedancetransforming planar marchand baluns and 60ghz balun design chinese article in keysight ads software note. The marchand balun can be made of spiral coils, lange couplers, and coupled microstrip lines. The dimensions of antenna can be found in the hfss simulation file. Miniaturized lumpeddistributed wideband balun using double. Ec 4th year shivanshu awasthi ec 4th year sarvesh kumar nishad ec 4th year novman asif ec 4th year. Design and characterization of multilayer coplanar. I am still trying to make the via visible planar marchand balun. Many examples of the marchand balun can be found in the literature 8,9,10. Enlarging figure 1 and showing all of the currents on the coaxial cable and balun and getting rid of the other half of the dipole antenna because it does not need to be illustrated here, we have figure 2. Wideband marchand balun and bowtie antenna for sensor aplications ilona piekarz, jakub sorocki, krzysztof wincza and slawomir gruszczynski agh university of science and technology mickiewicza 30 av.
Resonant frequency of the antenna10ghz relative permittivity of the substrate. Introduction in this tutorial, a dipole antenna will be constructed and analyzed using. The base hfss offering includes 3d and layout interfaces, 2. Among passive baluns, marchand baluns are favored, providing excellent balanced output over frequency while the 180 hybrid and the filter type are impractical due to large sizing and complicated layouts with poor balancing. Compared with the cascading microstrip multisection. Part of theamerican studies commons this thesis is brought to you for free and open access by the graduate school at scholar commons. Users may download and print one copy of any publication from the public portal for the. The proposed balun is simulated by hfss and measured by the vector. The balun is fabricaded on a doublesided pcb by rogerss 5880 material. It consists of rectangular substrate and the metal trace layer as shown in fig.
The construction of balun feed line is adopted to provide wideband. This balun consists of three pairs of coupled lines and two tapped transmission line stubs. Wideband marchand balun and bowtie antenna for sensor. Design and characterization of multilayer coplanar waveguid baluns and inductors khaled obeidat university of south florida follow this and additional works at. Figure 8 coupled line balun, using broadside coupler structure an improvement on the parallelline balun is a printed version of the marchand balun. The balun is simulated and optimized in ads and hfss to evaluate the characterization. By using analytical method, a millimeterwave marchand balun was designed and simulated by the fullwave electromagnetic software hfss, and fabricated in 0. A balun with coupled line structure and open stub is designed to obtain matched ports but provide small fbw. The results show that, the bandwidth of the balun is from 8ghz to 16ghz. Design and characterization of multilayer coplanar waveguid. Dec 18, 2014 the marchand balun is shown in schematic form in fig.
I connected a loop to the balun balanced terminals to act as an antenna. Design and validation of miniaturize rat race coupler based. Analysis and design of complex impedance transforming marchand. This was first reported in december 1944 issue of electronics which we have a copy. Balun simulation result in hfss linkedin slideshare. The distributed baluns consist of n sections of transmission lines 57. Lattice balun with inductors and capacitors replaced with. Marchand balun a wide band balun which has been used for years is the marchand balun8j. Zoomed in on a folded balun with all currents shown. The measurements indicate that the amplitude and phase imbalances are less than 1. Ansys hfss is a 3d electromagnetic em simulation software for designing and simulating highfrequency electronic products such as antennas, antenna arrays, rf or microwave components, highspeed interconnects, filters, connectors, ic packages and printed circuit boards. Design and analysis of microsrtip square patch antenna under the kind guidance of.
Download scientific diagram a conventional marchand balun. Design and analysis of micro strip antenna using hfss software. The balun has shown good performance in equally splitting the input power and creating a 180 phase shifting between the two outputs. A microstrip asymmetric folded dipole antenna on chip is proposed in this paper. Hfss port port1 does not have a valid reference plane above or. First the model of the microstrip patch antenna has to be drawn in hfss. Uniqueplanar vialess marchand balun with novel method of measurement yu ye1, 2, lingyun li1, hao sun1, and xiaowei sun1 1key laboratory of terahertz solidstate technology, shanghai institute of microsystem and information technology, shanghai 200050, china 2graduate university of chinese academy of sciences, beijing 49, china. With the explosive growth in the wireless communication industry, wideband transceivers. Since i am still learning to use hfss and still learning microwave design, i may have done something not right. Design of baluns and low noise amplifiers in integrated mixedsignal organic substrates a dissertation presented to the academic faculty by. If you dont have a copy, ask us nicely and well send it. Rf balun transformers university of colorado boulder. Design and analysis of millimeterwave marchand balun with. This video covers the implementation of a 10 ghz rectangular patch antenna, with an inset feed in ansys hfss.
885 910 1075 128 1094 639 263 1343 1453 648 1165 277 276 1126 1181 458 156 992 571 960 970 496 1087 1283 1461 821 611 1408 775 414 1443 618 661 668 755 879 1262 1281 933 1114 1076 527 830