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32 Threads found on Antenna Tracking
the antenna can be used for radar application in the range 8.4-8.66 GHz Does any frequency in this range can be used in radar application such as 8.1GHz, 8.6 GHz?
I attached here the links from GAP A Compact UWB Indoor and Through-Wall Radar with Precise Ranging and tracking The New UWB Self-grounded Bow-Tie antennas and the Applications in Different Systems
I know how to do the tracking part but the movement of antenna isn't smooth (fluctuation). I found that the accelerator plus gyroscope can improve that movement. I think,what you need to work on,is the accuracy of the antenna pointing in the correct direction of the satellite as it passes overhead.Try to use a stepper motor for the
There are other issues such as Rican fading off tall buildings from GPS giving false position, so antenna directivity can be important to reject Rican fading noise. THe only azimuth Doppler track designs I have done used two separated quad helix antenna for 500 mile rocket range and azimuth tracking
Hi people, I am trying to make a wiresless GPS tracking system using SIM908C and SIM548C as the development board. The issue is, the GSM antenna for SIM908C is given on one side, but when it is placed onto the board the GSM antenna connection for the SIM548C dev kit is on the opposite side. Does it really matter which side of SIM548C do (...)
Hello, I am looking for antennas for vehicule traking. In fact, the antennes will be stuck with magnetic under the vehicule. For GPS antenna (patch), there is no problem, i think, as it has his own ground plane but for GSM900 antenna, there is a problem. Indeed, to preserve a good S11, the reflector should be at lambda/4 and it is equal (...)
Hi guys I wrote a FDTD code for antenna now, when i analysis s11 parameter ,that's so bad (near zero) firstly , i calculate V,I secondly, i calculate Zin then , i calculate s11=zin-zs/zin+zs but my curev is incorrect how can i improve that ? plz help me if you know that , I have a little time to get the right answer
I suggest you Quectal L50 AGPS with passive patch antenna for cheaper & best solution.... Fastrax U501B will be the best AGPS module with patch antenna & has very good tracking sensitivity of 165dB. Quectel is available in India (Advent technologies) itself... I am doing a project with combination of L50 GPS & GSM modem.... Regards Udhay
Yes, there can be different impedance (or return loss) at antenna connector and the other side of the feeding transmission line. This is the reason that have to keep tracking the impedances all over the transmission path. Usually the RFIC manufacturers provides the impedance (S parameters) at particular pins of the IC package, and not behind the pi
Hello everyone! I am working on the development of antenna system for LEO Satellite ground Station in S band. Can anyone please guide me about the techniques that we prefer for tracking the LEO Satellite. To name some, that i have so far seen in literature, are: 1. Programmed track (Probably named as auto track as well?) 2. Conical Scanning
Hi all, I'm designing a monopulse tracking system. It consist of Rat-race monopulse comparator and a system of 4 dipole antennas. The comparator is working fine, designed in HFSS and measured. Now, the problem is that I want to receive a circular polarized wave. This means that antenna A has to be connected with cable length L, (...)
I do a copper pipe antenna and the size is 50cm * 50cm,the reader output power is 2W, so the reader range is 70cm, if you use two antenna , the range can be 100cm
Hello Friends, I am working on tracking antenna for monopulse radar system. I am given specification in term of tracking Slope...... I generated sum and difference pattern from antenna....but I don't know how tracking Slope is calculated, what is its significance and what should be its ideal value?? (...)
Definitely 32kHz will be better than 868MHz. For a similar application I know somebody that is using successfully a DCF77 receiver modified to work on 32kHz, and for TX a modified replica of a DCF77 transmitter. The antenna could be a challenge, but any long wire could be the starting point.
Depending on type of communication, in many cases is a simple receiver enough if you have a antenna with high gain. For weather satellites can you buy cheap receiver kits which connects to PC sound-card. High antenna gain => narrow lobe => tracking helps to keep contact a bit longer time. Many LEO satellites communicate in a narrow band mode (...)
hi friends, I am using SIM548 for my vehicle tracking application where i am facing following problem ->when i connect the GPS and GPRS antenna on pad provided the data sending is proper but the problem arises when the antennas are connected to the connectors provided. please help. thanks in advance
ASK Rf modules will give a range up to 100Mts max in open air communications with matched antenna. Too those with better ranges are available but i never had an oppportunity to test those. Zigbee too will work fine for the said range.
Is almost the same principle as using RSSI in an AGC control loop, but instead controlling the gain of the system is controlling the antenna position for maximum level from the beacon.
I would like to measure the Return loss of an antenna at Ka Band. My VNA doesn't go that high, but I do have an Agilent SA that will using an external mixer. If I have a tracking generator I believe that I can accomplish this and use the external mixer as my detector. Has anyone used a tracking generator with the Agilent E4407B? I don't (...)
Dear All, We have an X band Cassegrain antenna which tracks a LEO satellite using Program Track. Now we need to add AutoTrack capability to the system. I'm completely lost which equipment to use. I've found the following: 1. Single Channel Monopulse (SCM) 2. Monopulse Comparators 3. TE21 Monopulse tracking Couplers I couldn't find e