Mfj1702 2 position antenna switch better than 60 db isolation at 300 mhz better than 50 db at 450mhz less than 0. New line of usb controlled amplifiers, attenuators and switches from pasternack. Amateur radio antenna sold here,we update our stocks to keep in touch with modern inprovements in. Porttoport isolation of remote antenna switches free. The wa0831 4input 8output hfvhfuhf antenna distribution system, with a frequency range of 0. This unit reads bcd band data from two transceivers and automaticaly switches antennas with colision protection and blocking power amplifier during ptt active hot switch protection. Port to port isolation and insertion loss are excellent up through 150 mhz. I would like to serial computer control the antenna switch via the computer remotely. If you set antenna 3 to 20 meters, it will select antenna 3 the first time you transmit on 20m. Increasing the physical separation between the antennas. I have four antennas and a dummy load connected to a ldg dts6 switch. A pin diode behaves as a currentcontrolled resistor at radio and microwave frequencies. Computer control allows antennas to be selected by band instead of antenna thus greatly simplifying antenna selection.
Here, youll find links for high quality coax switch covering hfvhfuhf. The rf common port might be connected to the system antenna in a typical application with rf posts one and two connected to transmitter and receiver. Usb controlled rf components new line of usb controlled amplifiers, attenuators and switches from pasternack ultra broadband frequencies ranging from 50 mhz to 40 ghz. Antenna genius brings together a powerful cpu, fast network interface, rugged, high power relays and a programmingcontrol app that runs in all supported versions of windows. A few years ago, my friend joe spinks, aaokw, and i started building and experimenting with double bazooka. Ars manuals ars software interlock manual interlock software.
Ho600 five position remote control antenna switch, so239 connectors, dc to 150 mhz indoor mount no weather hood. Take a look at our eight antenna three radio installation for 4u1itu or a switching matrix. I dont know what computer program you are using to try to control the antenna switch, but once i. Rfmicrowave switches spdt, dpdt, sp4t, sp6t, sp8t, sp10t.
There are two relays per port wired in series to help with isolation, with each pair switched together by a tpic 595 relay driver. One approach is to construct the singlefeed switchable feed network structure with an msnri coupledline coupler in order to reduce the mutual coupling level between antennas. Oct 25, 2018 i agree, the port to port isolation is the thing to worry about. About 11months ago, i purchased a dx engineering remote antenna switch and the cc8 controller. Antenna genius is the complete solution for integrated antenna switching, whether youre a. The switch provides high linearity performance, low insertion loss, and high isolation. The antenna axis configuration is an elevation over azimuth.
When you listen on a band, if you have more noise than you would expect then you may have a lot less porttoport isolation than you should. But given the nature of this project meaning the plan was in flux, i wanted something a bit more easily configurable. Controlled automatically by flexradio, 4o3a interface genius, bcd or manually by our windows app or pin to port. Highest porttoport isolation of any switch available today. Sep 03, 2018 i dont know what computer program you are using to try to control the antenna switch, but once i neededwanted to do this and the simplest thing i found was to generate a sound from an audio program and feed a transistor circuit to drive a small 12v relay to switch my 28v relay.
Ultrareliable mechanical switches capable of extended life up to 10million switch cycles. For our switch, we selected control trace widths of 15. Together with remoterig rrc1258 it can be setup to automatically follow your band changes. How and why to use pin diodes for rf switching digikey. Antenna switch 1269 high performance remote controlled 10 way antenna switch.
Antenna genius tcpip lanwan antenna switches vibroplex. And more importantly, i did not want to run another set of cables to drive a wired remote controlled one. A quick look at an older hf multiport antenna selection switch measuring insertion loss and porttoport isolation. Serial computer controlled antenna switches flexradio community.
For our switch, we selected control trace widths of. The as2x6 remote antenna switch lets you remotely switch up to 6 hf antennas. K7age has a great youtube video on how to control the ameritron switch with a national control device board. Our usb controlled switches, attenuators and more software download page. Freqez can connect to the bcd band outputs available from most transceivers. Antenna genius 8x2 is the first in a new antenna switch line from 4o3a signature sitting proudly beside rotator genius, interface genius igm, and station 4o3a antenna genius 8x2 so2r antenna switch with tcpip. Antenna genius 8x2 plus 8 antennas, 2 transceivers antenna genius 8x2 plus, front panel antenna. This link is listed in our web site directory since tuesday sep 9 2008, and till today build a remote control antenna switch has been followed for a total of 2589 times. Even could be controlled by the band data output of many hf rigs. Home usb controlled rf components software download pasternack software download please select click on your desired software. Ho600 five position remote control antenna switch, so239 connectors, dc to 150 mhz indoor mount no weather hood five position antenna remote control antenna switch, so239 connectors, dc to 150 mhz indoor mount stackmatch for three antennas, 3 kw, so239 connectors, requires a controller.
The safe power isolation is not only about the switch isolation. The eight pak may also be controlled directly from a computer. The unit features high dynamic range and channel isolation. Hi folks, making an remote antenna selector switch is a very simple electronics home task. We carry antenna switches with robust power ratings that eliminate crosstalk and interference caused by strong signals on other ports. It would have been nicer if the commands tofrom the switch were all plain ascii text without any binary values.
The is your source for news about amateur radio, shortwave, cb radio website. So when you change the operating band, the antenna switch can follow the operation and doing the switching at the same time. Attenuators and switches require downloadable control software. Wire controlled by a mechanical switch or station genius, sac x or any other band decoder. In order to provide the highest degree of isolation between antenna at a reasonable cost the eight pak antenna outputs are arranged as two groups of four each. If you want to use tmate2 or flexcontrol or behringer dj controller and autotuners and amps and four or five different panadapter programs and winkeyer, then n4py software is your only choice. So i use the ab switch to switch to the inside antenna when i am having problems with the. The switch assembly contains the relays and relay drive circuitry to select between position 0 to 7. Dowkeys matrix product line offer software controlled solid state switching. Steren network switch coax splitter 2 way antenna splitter manual transfer switch coax cable splitter 2 way coaxial cable adapter for tv 2 way coax ab switch for tv 1 pack 200315.
The switch can handle an input power of 34 dbm at a frequency of 1 ghz. Spdt, dpdt transfer, sp4t, sp6t, sp8t, and sp10t mechanical and solid state rf switches for 50ohm and 75ohm systems spanning dc to 40 ghz. Manual control in basic mode antennas are selected by the rotary switches on the controller unit. Mechanical switches tend to handle the highest power and offer the lowest insertion loss and best isolation, but since they are mechanical, they. The usual solution for this is the popular six pack switch. The system consists of acu rack, adu rack, dbr rack and portable antenna control unit pacu. Perfect for so2r and multiop contesting or making the most of your dual rx transceiver. I called dx engineering, and explained the problem. Software drivers for most common development environments. The relay module is used as an option for antenna genius for antennas that require more switching capability. Dowkey is the best in the rf switch industry and has a dedicated team to. This line of sp4t relay switch accessories are part of over 20,000 unique in stock products. Can i use an antenna switch designed for hf on vhfuhf.
This dpdt offers low insertion loss and low harmonic generation paired with high isolation between rf ports. Together with remoterig rrc1258 it can be setup to automatically. When you activate band control, the settings in the pc program will select an antenna automatically based on the frequency in use. An example of a singlepole doublethrow spdt rf switch uses pin diodes as switching elements and passive components that decouple the rf and dc bias signal paths. Port five is connected to the rf feed line by default and a control signal must be present to. In addition, specific models mentioned in the ham radio forums like diamond coax switch,comet coax switch, icom, watson, mfj coax switch and more are here for future reference. Ra20a1 remote antenna switch w5bwc electronics 9108 fm 1972 gilmer, tx 75645 february 2009 2 the ra20a1 is designed to remotely switch five 50 unbalanced antenna ports to a single rf feed line using a weather resistant, tower mounted assembly. Porttoport isolation is the property of the remote antenna switch that keeps you from hearing signals from any of the other antennas connected to your switch.
Rotor control software category is a curation of 10 web resources on, pstrotator, rotorcraft, satellite tracking with winrotor. Solidstate switches with extremely fast switching times. We are confident ag is the best antenna switch you can buy. Up to 6 antennas to 2 radios high isolation switcher. Discussion in general technical questions and answers started by k8ea, sep 3. Since 100w 50dbm, for most situations we would like to see 50db or better loss. I have got isolation between antenna port 1 and port 2 which is 10 db.
This antenna has 4 directions, which the operator has to switch. I wrote the software to include up to 6 antenna selections and 8 station control. Build a remote control antenna switch resource detail. Usb controlled rf component software download from pasternack. We provide you with the latest news and videos straight from the amateur radio world.
Radio shack, remote control ab switch for 75 ohm coax. Usb controlled rf switch and attuator components software. Sp4t relay switches with sma connectors have an in stock status over 99%. Nov 29, 20 a quick look at an older hf multiport antenna selection switch measuring insertion loss and porttoport isolation. Rf switches guide signals in smart phones the myriad of different bands, modes, radios, and functionality found in a modern smart phone calls for the increased use of simple, highperformance rf switches as well as integrated switch. Freqez is a doityourself hardware software project that provides highly configurable band decoding and remote antenna selection. The main category is antenna switches that is about antenna switch projects. An eight channel remote control antenna selector arrl.
The kit consist of two pcbs, one which is for the rf part that route the actual antennas to the radios and one board which contains a bunch of relays which used to interlock the radios in a fashion that first wins. For this so2r implementation, a dualported antenna switch was needed that would allow the run station antenna access. Low cost solid state rf switches with high isolation and. Fully integrated universal band decoder and antenna switch controller. The switch is controlled via a mipi rffe controller. Another very useful control mode provided in this switch is by band. When i was on vhfuhf i always had one antenna up for each bandradio. Control signals are current limited to prevent wiring or equipment damage. The bm5 bandmaster v is a full featured unit that contains a universal band decoder and antenna switch controller. Could be controlled also from simple web interface or manualy from front panel knob. All channels are active simultaneously and provide data translation for your station accessories. Low cost solid state rf switches with high isolation and usb. The freqez software and is freely available to all hams, and consists of a pair of programs. As1289 remote controlled antenna switch preliminary.
This paper presents the isolation improvement techniques of a microstrip patch array antenna for the indoor wideband code division multiple access wcdma repeater applications. Control cable requires 7 low current conductors, such as cat 5 computer cable. This dp4t offers low insertion loss and low harmonic generation. This coax antenna switch works well i own the dts6 without any remote. Vaunix lsw series lab brick rf and microwave programmable switches offer high isolation, solidstate switching for wireless testing in both single pole double throw spdt and single pole four throw sp4t configurations. With better than 70 db of porttoport isolation, you can be sure the signal is going where you want it to. Antenna switch projects category is a curation of 31 web resources on, five antennas switch box, beverage antenna switch, remote control of mast mounted equipment. The ports are selectable for any combination of the 10 bands and four antennas through the pc software. Isolation improvement of a microstrip patch array antenna for.
Antenna isolation is a measure of power transfer from one antenna to another transmit tx to receive rx, generally represented as a loss in db. An eight channel remote control antenna selector select between eight antennas or feed one antenna to any of up to eight radios. Antenna genius is the complete solution for integrated antenna switching, whether youre a contester, dxer, or merely desire the ultimate in automatic antenna switching capability. Satcom satellite communication dowkey microwave has been a prominent supplier in the satcom satellite communication industry for decades with a wide range of relays and switching solutions available for many different ground base and teleport applications. I bought a 4 position manual antenna switch and very quickly realized again that i did not want to go up and down the stairs with kids and wife sleeping to switch the antenna. Our selection of fully rfshielded dx engineering and ameritron remote switches use quality components and are weatherproofed to stand up to the elements. In many applications, it is necessary to switch the rf signal path to route and connect to different antennas, amplifiers, and filters. Switching rf power in portable applications is challenging for electromechanical switches due to size, cost and speed considerations. The antenna switch is designed specially to be used for remote over the internet controlled systems, but can of course be used in other applications also.
Fourposition hf antenna switch with pc control nuts and volts. The onchip controller allows powersupply voltages from 1. The bgsx24mu16 rf cmos switch is specifically designed for lte and wcdma quadruple antenna applications. Pasternack sp4t relay switches ship same day world wide. Buy radio shack, remote control ab switch for 75 ohm coax remote controls free delivery possible on eligible purchases. Satcom satellite communication relays and rf switching. The two groups are antennas 1 to 4 and antennas 5 to 8. However after that time, i would notice that receive became intermittent on a couple of the ports, only to come back after a short burst of rf. Fourposition hf antenna switch with pc control nuts. Allows control from multiple operating positions and over the internet. Isolation between antennas of imt base stations in the land.
The switch is fully software controlled over wifi or via a usb cable when used locally in a shack. How to improve isolation between two antenna ports in a integrated antenna. The reactance loads are optimized for constant impedance matching at the. Switch positions 1 thru 8 correspond to antennas 1 thru 8. Dx engineering offers only the best remote antenna switches. Like the conventional pn diode, it allows current flow in one. N4py software is more than just a rig control program. Since it is used for switching hf antennas to a single radio lt is not so critical. The remote control antenna selector consists of a switch assembly and an optional remote controller assembly. As a general rule, the antenna isolation should be as large as possible to minimize interference between systems and can be maximised by. How to improve isolation between two antenna ports in a. Tech ag is powered by a microchip technology pic32 microprocessor, a 32 bit device. The switch can be manually controlled via an internal web interface.
Serial computer controlled antenna switches flexradio. When deliberately selecting the same antenna the last radio to request that antenna is routed to the bypass port which would sensibly have a dummy load on it or maybe a remote all band antenna. The bgsx22g5a10 rf mos switch is specifically designed for lte and wcdma multi antenna applications. The switch is connected to the internet primarily via. I need to know what software there is out their to control the remote coax switch via a rs232 serial port. The sp4t switch is aimed at antenna switching in dualmode cell phones such as required for gsmdcs1800 applications figure 3. The sky552669lf is a dual singlepole, sixthrow 2xsp6t mobile industry processor interface mipi. About build a remote control antenna switch the resource is currently listed in in a single category. The software simsurfing simulates the characteristics of murata products. Lo and behold, after a quick search on amazon, this one popped up. Discrete switch ic is the component for swiching the paths in cellerconectivity rf circuit.
For example, if you transmit on 80 meters and have antenna 2 set for that band, the switch will automatically change to antenna 2. Acss is an antenna pointing system, controlled manually or. In the study, we present a compact espar antenna via an analog rf switch for a single rf chain mimo system intended to transmit a bpsk signal at 2. For example, if you transmit on 80 meters and have antenna 2 set for that band, the switch. While pin diodes offer some unique advantages relative to other nonmechanical options such as cmos switches and mems structures, they are difficult to design into a circuit unless their characteristics are clearly understood. High isolation 2 radio coaxial antenna switch with green heron remote control system. These lowcost, portable units are powered and controlled via a usb port connection to any pc or powered hub. Remote switching, bias tees, antenna sharing switches. The antenna control servo system acss is built to control a 32mtr deep space antenna dsn system.
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