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Recent content by joelo

  1. J

    Detailed explanation of SPDIF

    SPDIF History Since the early 80's, a step towards digital audio has been set by the introduction of the Compact Disc player. In the beginning, those signals stayed inside the set, and were converted to analog signals before leaving the cabinet. A new trend is to keep signals into the digital...
  2. J

    RFID kit ???? Please help

    Adilam’s Low Cost RFID Starter Kit Part No: EVAL-RFID ... RFID is often discussed in connection with the surveillance or tracking of goods, where it is seen as a valuable alternative to bar code systems **broken link removed**
  3. J

    what is the metal used in microstrip antennas?

    you can look the PIFA definition .... **broken link removed**
  4. J

    ---> Designing ONBoard Antenna

    Here is another article initiated by the work of outcast_one, a user in the forum of netstumbler.com. He asked me to put his pictures into an article as the one about the Lucent Range Extender antenna (which can be found here). It took me a long time (about 4 to 6 weeks) to do so, as I was very...
  5. J

    Guidelines for RF PCB design in range of 200 MHz - 1 GHz

    RF PCB design In typical RF PCB designs some of the tracks need to be much wider than others. Additionally, in some cases, if the RF designer has laid out the PCB with no concern for thermal effects, that may lead to 'tombstoning'. It is possible that there will be components (typically...
  6. J

    Which should I design first, LNA or PA?

    LNA or PA? This is an article based primarily on empirical evidence, and is not the usual theoretical treatment of the subject of PA design, although it is in full agreement with the laws of physics. As such I think you will find it offers some fresh information in the spirit of amateur radio...
  7. J

    Looking for any information about RF Chokes

    RF Chokes Information VFO and Amplifiers contain RF Chokedetail detail see it...... http://www.pan-tex.net/usr/r/receivers/elrbuild11swl.htm
  8. J

    Looking for an antenna design software

    antena software I used IE3D to sim antenna at www.ie3d.com.
  9. J

    PIN Diodes as switching circuit

    Re: PIN Diode Microwave InGaAs PIN Diodes for Millimeter-Wave Applications **broken link removed**
  10. J

    PCB Trace current capacity

    pcb trace current capacity I feel that it's very useful data for the PCB designer. Merry X'mas for everyone!!
  11. J

    Guidelines for RF PCB design in range of 200 MHz - 1 GHz

    RF PCB design I used ADS or IE3D to simulate the performance. It is very useful for you to design.
  12. J

    log periodic planar antenna?

    winradio ax-31b planar log-periodic antenna The AX-31B antenna is a compact VHF/UHF directional antenna with an in-built amplifier, which provides a low-cost alternative to conventional VHF/UHF antennas (for example discones), especially for indoor professional and amateur applications...
  13. J

    What exactly is the return loss?

    what's return loss? Return loss (RL) is a very important noise measurement recently defined for local area networks (LANs) and LAN components. This statement raises an obvious question: Since LANs have been around for years and RL is very important, then why is RL relatively new and just now...
  14. J

    Looking for a good RF design for a student

    rf design I think that is good book for basic because I ever used it in school https://www.amazon.com/exec/obidos/tg/detail/-/0750699469/ref=pd_bxgy_img_2/104-9027152-8569559?v=glance&s=books
  15. J

    Which PCB tool to choose?

    1. PCAD 2. candence 3. power PCB We all used allergo to layout PCB.

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