70 cm patch antenna software

Jpole antenna is pretty easy to build and usually designed by amateur radio operators through this software, you can easily find out four important parameters to build this antenna namely, radiator length, driven stud length, gap space, and feedpoint. It is used to design jpole antennas for the desired frequency. Here, youll find links for high gain antennas covering hfvhfuhf. In this thesis, a multiband stacked patch antenna for satellite communications is. This calculator can be used to design a quarter wave ground plane antenna, with radials. The hb9cv antenna is the most popular directional antenna in the world. Enter the desired frequency and select the desired calculation from the drop box. The new antenna is optimized for weak signal work up through the atv subband and its swr is below 1. Antenna for 70 cm 432440 mhz category is a curation of 55 web resources on, 432 mhz 5 elements yagi, dg7ybn gtv 702m, 432 mhz yagi antenna. A closer look at the connection box and attached aircell7 coax. A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate, such as a printed circuit board, with a continuous metal layer bonded to the opposite side. The measurements below are for building a simple dipole antenna. Further to the encouraging results in building a single patch for 70 cm, i decided to design and build an array of patches specifically for the 70 cm uplink for ao40. The handitenna 70 cm portable antenna ham radio library.

An experimental patch antenna for 70 cm by greg chenco vk3blg. Pg1ns ham radio site 70cm projects directional antennas. A magnetic mount antenna for a car placed on a window air conditioner works well. Once you get familiar with all the capabilities and features of the demo version, you will have acquired the knowhow to design more complex antennas. Which software is better for antenna designing specially micro strip. The wavelength a gps antenna must be designed for at 1575. One wooden square, 1 cm per side, 50 cm long 70 cm for the 20 element antenna. It covers the 700, 750, 850, 900, 1800, 1900, and 2600 mhz bands. The antenna is a circularly polarized aperturecoupled microstrippatch antenna for use in the l1band at 1. Best 2m70cm ht antenna so ive seen a lot about the nagoya na771, the comet sma24 ht, and the mfj1717s. The formula and basics of yagi antenna calculator are also explained with example. This antenna has the following characteristics when simulated on 3x3 in ground plane. This page contains some antenna designs for the 2 meter amateur 144148 mhz, murs 151. Please note this antenna is designed as a descrete antenna and only being 120cm in length is a compromise for the bands covered.

Fully described in the june 1985 issue of wireless world gb, pages 4346 and cover. The evaluation was carried out at my qth in holstebro jo46gi. These stations demand assured circular polarisation and honest gain, and use this 70 cm helix with outstanding results on all satellites uosat, pacsat, ao10, fo20, ao40 and especially terrestrial. The antenna has low swr at the upper edge of the 70 cm band. Patch antenna design gareth louis shaw a dissertation submitted to the faculty of engineering and the built environment, university of the witwatersrand, johannesburg, in ful. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz. Uhf yagi is based on dl6uw yagi antennas designformula. Rough dimensions for a 70 cm air dielectric patch from memory, my notes are back in home port is about 33 cm square, spaced. The handitenna 70 cm portable antenna here is a highperformance handheld beam antenna that is easy to build and guaranteed to improve your downlink from the leo satellites over any rubber duck or. Magnetic mobile antenna ham radio 2 meter 70 cm 140 to 150 and 440 to 470 mhz. This 50ohm impedance antenna, when fed with 25100w of ssb rf at 435mhz, makes reaching amateur satellites such as ao40 and ao10 a snap. Antenna for 70 cm 432440 mhz category is a curation of 55 web resources on, 432 mhz 5 elements yagi, dg7ybn gtv 70 2m, 432 mhz yagi antenna. Does anyone have plans on how to build a 70cm loop antenna. Listed under the antennas70cm category that is about antennas projects for 432440 mhz.

The first antenna adopts microstrip line feeding, and the antenna radiation patch is composed of a folded tshaped radiating dipole which reduces the antenna size, and two symmetrical rectangular. The main category is antennas projects for 432440 mhz that is about antenna for 70 cm 432440 mhz. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. Extending the antenna changes the current distribution.

Pdf design and analysis of microstrip yagi antenna for wi. Antennas using patches as constitutive elements in an array are also possible. The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. Use a power supply to make sure you a getting full output power. It is quite possible, that other calculators deliver slightly different results.

Some are based on lookup tables, some completely hide their algorithms. Jpole is a free and portable antenna design software for windows. Analysis of an airspaced patch antenna near 1800 mhz. The demo version of the software is fully functional and more than adequate for most ham radio antenna design needs. In my page you will find several details of manufacture, additional. However, in their approach, some design parameters are determined using simulation through commercial software. We tested it on ethertronics own demo board, which is a 140x50mm ground plane pcb with smt matching components.

While an amateur license is required to transmit on the 2 meter and 70 cm bands, the murs frequencies are unlicensed. Ive found 2m ones but cant seem to find any to work on the 440 side. This page covers 3 element yagi antenna calculator. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. The handitenna 70 cm portable antenna here is a highperformance handheld beam antenna that is easy to build and guaranteed to improve your downlink from the leo satellites over any rubber duck or mobile whip. This link is listed in our web site directory since wednesday apr 2005, and till today 70 cm atv antennas has been followed for a total of 38558 times. Broadband five elements antenna length 50 cm designed on the base of short five elements antenna for the 70 cm band antentop 01 2016. Amateur radio antenna sold here,we update our stocks to keep in touch with modern improvements in.

Printed or written template with antenna dimensions. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. A few contacts with the uk showed that the antenna is working great. Preparatory material for an article published amateur radio wireless institute of australias national magazine. Sqbm6010p quad band 106270cm base antenna moonraker. The itu amateur radio allocation is from 430 to 440 mhz. The 70 cm pattern is somewhat high but still works fine. Pdf advantages of microstrip patch antennas make them solid candidate for the. This calculator is designed to give the horizontal length of a particular dipole including tees antenna, or one side of it, for the frequency chosen.

Which software is better for antenna designing specially micro strip patch antenna. This righthand circularly polarized patch antenna was designed for operation at 2. Uhf yagi is based on dl6uw yagi antenna s designformula. A quadrature hybrid coupler was used to obtain righthanded circular. Eggbeater leo satellite antenna for 432 mhz 70cm or 2 meter. Antenna performance performance of the new xquad was evaluated using my old 70 cm yagi as reference antenna. The most common type of microstrip antenna is the patch antenna. I have designed singlelayer microstrip antennas, proximitycoupled. About 70 cm atv antennas the resource is currently listed in in 3 categories. Further to the encouraging results in building a single patch for 70 cm, i decided to design and build an array of patches specifically for the 70 cm uplink for ao40 and ao10 and for use with other satellites such as fo20, fo29 and uo14 for the downlink. As shown in the graphs, the calculated result are very close to the measured results.

Thanks to its great parametres this antenna has been used since 1954. Design of a multiband stacked microstrip patch antenna for satellite. The 70centimeter or 440 mhz band is a portion of the uhf radio spectrum internationally allocated to amateur radio and amateur satellite use. A single antenna can cover the entire amateur 2m70cm allocation with more than acceptable swr. Patch antennas are very low profile, and might have some advantages in antenna restricted areas. The old antenna is the 6el70 6 element yagi with 10 dbd gain from vargarda radio in sweden. While an amateur license is required to transmit on the 2. Pdf microstrip patch antennas for microwave s band, c band and. The problem is im not sure ive ever seen a test done where people dont immediately point out that the swr cant be measured on a meter because the person holding the ht and the ht itself are part of the ground plane. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces.

Gain of this two element antenna is the same like for like gain of classic three element yagi antenna. Experimental patch antenna an experimental patch antenna for 70 cm by greg chenco vk3blg. In addition, specific models mentioned in the antennas forum like tonna beamyagi antennas,and more are here for future reference. Design and analysis of rectangular microstrip antenna operating at. To put it mildly, at microwave frequencies antenna design is fraught with both peril and magic. Analysis of the g3ltf dual band feed for 23cm and cm, g3ltf. Click on calculate and the optimum length for that combination will be displayed in feet and inches. There are many simple choices that dont involve trying to put a large antenna on a roof. This flattens out the pattern removing power from the useless for vhf purposes vertical dimension and giving more horizontal gain and at a lower angle. Here are three examples of patch antenna simulations using sonnet. For fm work primarily with repeaters, a lowly ground plane, with a radiating element about 19. Use 70 cm where possible instead of 2 meters if its appropriate for your area.