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Forum: RF, Microwave, Antennas and Optics

RF, microwave, antennas and optics questions. Radio/TV/satellite transmitters and receivers.

  1. Sticky Thread Sticky: 26V Current Sense Amplifier

    Started by mmatheson, 16th May 2018 16:43
    • Replies: 0
    • Views: 403
    mmatheson
    16th May 2018, 16:43 Go to last post

  2. Sticky Thread Sticky: Do not post e-books or requests for e-books or ieee papers here!

    Started by klug, 9th May 2007 08:28
    • Replies: 0
    • Views: 31,523
    klug
    9th May 2007, 08:28 Go to last post

  3. Sticky Thread Sticky: LEGALS/UNLEGALS FILES----NEW RULES

    Started by james, 26th December 2002 15:44
    • Replies: 0
    • Views: 31,700
    james
    26th December 2002, 15:44 Go to last post

  1. Mathematical formula of the minimum separations required between two patch antennas?

    Started by Suo, 7th November 2018 16:02
    1 Attachment(s)
    • Replies: 6
    • Views: 336
    vfone
    Today, 12:09 Go to last post

  2. in/out stability circles enclose smith chart, but k-stability factor is all above 1?

    Started by skatefast08, Today 05:59
    1 Attachment(s)
    • Replies: 1
    • Views: 95
    vfone
    Today, 09:33 Go to last post

  3. I have a few of questions on an RF amplifier design

    Started by skatefast08, Yesterday 23:55
    1 Attachment(s)
    • Replies: 1
    • Views: 91
    vfone
    Today, 09:25 Go to last post

  4. WR08 with UG-387/U-M Flange "Impedance"

    Started by uri1636, Today 06:45
    • Replies: 0
    • Views: 63
    uri1636
    Today, 06:45 Go to last post

  5. Coaxial feed loop antenna in HFSS

    Started by ycwu, Today 00:19
    3 Attachment(s)
    • Replies: 0
    • Views: 72
    ycwu
    Today, 00:19 Go to last post

  6. C band SATCOM question

    Started by senmeis, 7th November 2018 16:34
    • Replies: 1
    • Views: 258
    jesuschrist
    9th November 2018, 11:54 Go to last post

  7. [SOLVED] 915Mhz Antenna design

    Started by amirke, 29th October 2018 16:18
    1 Attachment(s)
    • Replies: 18
    • Views: 494
    FvM
    6th November 2018, 23:08 Go to last post

  8. improve radio selectivity

    Started by yoosefheidari, 5th November 2018 22:32
    2 Attachment(s)
    • Replies: 6
    • Views: 212
    yoosefheidari
    6th November 2018, 19:36 Go to last post

  9. What is the ABCD matrix of a short stub and open stub transmission line?

    Started by skatefast08, 29th October 2018 08:40
    2 Pages •
    1 2
    5 Attachment(s)
    • Replies: 24
    • Views: 663
    PlanarMetamaterials
    6th November 2018, 16:58 Go to last post

  10. VCO uses no varicaps. How does it work?

    Started by neazoi, 6th November 2018 11:37
    1 Attachment(s)
    • Replies: 3
    • Views: 145
    betwixt
    6th November 2018, 16:42 Go to last post

  11. Phase shifter vs TTD (delay)

    Started by ktr, 2nd November 2018 13:08
    1 Attachment(s)
    • Replies: 11
    • Views: 329
    vfone
    6th November 2018, 16:39 Go to last post

  12. Block up converter Ka band

    Started by akhilpaulv, 31st October 2018 05:12
    • Replies: 1
    • Views: 132
    biff44
    6th November 2018, 14:40 Go to last post

  13. Draw circular spiral in cst mws

    Started by kela3kela, 6th November 2018 08:52
    5 Attachment(s)
    • Replies: 1
    • Views: 90
    kela3kela
    6th November 2018, 11:59 Go to last post

  14. [SOLVED] 2 Power amplifiers in parallel

    Started by levnu, 31st October 2018 07:11
    • Replies: 18
    • Views: 520
    levnu
    6th November 2018, 06:55 Go to last post

  15. choke ring antennas against multipath effect

    Started by senmeis, 28th October 2018 11:12
    • Replies: 4
    • Views: 258
    PlanarMetamaterials
    5th November 2018, 16:45 Go to last post

  16. RF-DC conversion efficiency calculations in ADS

    Started by bitspilani, 22nd July 2018 10:34
    2 Attachment(s)
    • Replies: 1
    • Views: 240
    bitspilani
    5th November 2018, 12:31 Go to last post

  17. Avoiding the crystal filter or multi-band phaser in multi-band SSB transceiver.

    Started by neazoi, 30th October 2018 13:53
    1 Attachment(s)
    • Replies: 9
    • Views: 447
    neazoi
    4th November 2018, 18:05 Go to last post

  18. How to match ceramic resonator to 50R?

    Started by neazoi, 2nd November 2018 15:55
    4 Attachment(s)
    • Replies: 10
    • Views: 349
    FvM
    4th November 2018, 15:46 Go to last post

  19. Looking to buy ready made RF transmitter (40 to 200) khz

    Started by waelsf, 1st November 2018 14:22
    • Replies: 7
    • Views: 252
    vfone
    1st November 2018, 19:51 Go to last post

  20. Element overlapping unit cell in frequency selective surface

    Started by HughDaMann, 29th October 2018 18:59
    1 Attachment(s)
    • Replies: 5
    • Views: 228
    PlanarMetamaterials
    1st November 2018, 15:51 Go to last post

  21. How to extract S-parameters without EM field solvers?

    Started by parps, 22nd October 2018 17:21
    • Replies: 11
    • Views: 447
    volker@muehlhaus
    31st October 2018, 17:00 Go to last post

  22. EM model Harmonic balance simulation

    Started by Kooky613, 31st October 2018 15:44
    • Replies: 3
    • Views: 126
    volker@muehlhaus
    31st October 2018, 16:56 Go to last post

  23. BJT transistor mextram model accuracy

    Started by inass57, 30th October 2018 11:18
    2 Attachment(s)
    • Replies: 9
    • Views: 267
    inass57
    31st October 2018, 16:12 Go to last post

  24. The mathematical formula of relation between mutual coupling and the distance between

    Started by Suo, 30th October 2018 10:20
    • Replies: 2
    • Views: 185
    PlanarMetamaterials
    30th October 2018, 15:31 Go to last post

  25. How to find if a frequency is being received by tuners ?

    Started by Externet, 28th October 2018 00:41
    2 Attachment(s)
    • Replies: 10
    • Views: 372
    Externet
    29th October 2018, 15:16 Go to last post

  26. I need calculate and measure C2, C3,C1 for active inductor

    Started by noor84, 15th October 2018 19:41
    3 Attachment(s)
    • Replies: 6
    • Views: 326
    vfone
    29th October 2018, 13:23 Go to last post

  27. ADS EM model problem s-parameter simulation

    Started by Kooky613, 23rd October 2018 18:15
    7 Attachment(s)
    • Replies: 18
    • Views: 612
    volker@muehlhaus
    27th October 2018, 09:35 Go to last post

  28. HFSS - 50 Ohm Coaxial lines terminated with 50 Ohm impedance boundaries. |S11| too large

    Started by ibutter, 25th October 2018 22:12
    1 Attachment(s)
    • Replies: 2
    • Views: 370
    PlanarMetamaterials
    26th October 2018, 15:27 Go to last post

  29. How to avoid the warning:"One or more port lines were lost due to geometry modificati

    Started by folkerlee, 24th October 2018 04:50
    1 Attachment(s)
    • Replies: 1
    • Views: 175
    PlanarMetamaterials
    25th October 2018, 15:56 Go to last post

  30. Network analyzer Port extension question

    Started by arr_baobao, 21st October 2018 10:02
    1 Attachment(s)
    • Replies: 2
    • Views: 235
    ktr
    25th October 2018, 10:18 Go to last post
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