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CC1101 433Mhz PCB layout antenna

Other Parts Discussed in Thread: CC1101, CC430F5137, CC1200EMK-420-470

Hello everyone,

In my  CC1101 433Mhz  RF design, I am going to use PCB copper antenna instead of chip antenna, but I can not find any example reference in technical support documents, anyone has some experiences about how to design PCB copper antenna for 433Mhz CC1101? please give me a hand. thank you very much !

Simon

  • I did a search for a pcb antenna at 915 MHz. I actually found one for 434 MHz. I can not remember the url, but give it a try. It was a 50 ohm antenna that wrapped around the board, and had good radiation in a plane flat along the edge of the board. If you need directionality like some of the 'F' antennas at 915 MHz, that will take some cut and try. What is the dimension of the board you have to work with? What kind of radiation pattern are you looking for?

    Ron

  • Dear ronnym

    thanks for your replay.

      In my PCB layout, I keep a blank space about 40mm X 26mm for copper antenna layout, as for radiation pattern, it is not specified, could you please suggest how to modify the 'F' antenna at 915Mhz to match 433Mhz use?

    Simon

  • Drop me an E mail to my address in my profile. I will send you an app note for design.

    Ron

  • Do you get me an app note for design??  I need.

  • Simon,

    I design PCB antennas for TI evaluation modules.    Usually you choose the type of antenna for a particular applicaiton,  which involves choosing omni-directional, form factor,  differntial or single-ended.   The length of the radiators is a function of the speed of light.   If you understand Smith Charts you can design an antenna or if you have a 3-D simulator like Agilent ADS program,  Ansoft or others.   Your must correct the lengths and adjust the parameters for the PCB thickness or you will end up with a low efficiency antenna. 

    In terms of size trying to fit an inverted F monopole for 433 doesn't make allot of sense because its size is large.  I did one for a customer.  A standard dipole would make more sense then you need to work at the matching for differential interface.

     

  • Hello Simon I have the same problem, I did to antenna but the performance is not correct. Please if you found the solutions help me with some tutorial or some. I saw that Rony help you with some tutorial. Have a nice day.
  • I'm finishing an 868MHz differnial antenna for the CC1101L.  It's close to release in a couple of weeks.  Presently lab measurements show it transmits 3 dB more power than a whip and reception is also slightly bettern.   This size is 1.5 inch x 1.8 inch including the layout of the CC1101.  It can be scaled for 31mil board presently designed for 62 mil board.   For 433 the length of the radiator is about doubled.   This compares to TI released monopole PCB antennas an improvement of 5-6 dB.    This is a 1/4 wave dipole design which requires no ground plane compared to the monopole which relies on the ground plane.   There is no balun since it connects directly to the CC1101 inputs. 

    For those who need 433 MHz it will be about 3-4 weeks for me to scale this antenna.  You should expect the same performance as the 868MHz or range greater than 1.3Km.   For those who need more compact design we will shortly have 1/8 wavelength antennas avaliable.  There size will be smaller with about 60 to 70% range compared to the full 1/4 wave antenna.  The 1/4 wave antenna will have > than 90% efficiency.  

     

    Regards

  • Can you share the design in early stage ? I would like to implement this on the CC1111 module I'm designing. Also can it be used with CC430F5137 as it has CC1101 core ??

  • Hello Everybody , in the MSP430™ SoC with RF Core datasheet page 1....I saw the next for CC430F5133X...

    High-Performance Sub-1-GHz RF Transceiver
    Core
    – Same as in CC1101
    – Wide Supply Voltage Range: 2.0 V to 3.6 V
    – Frequency Bands: 300 MHz to 348 MHz,
    389 MHz to 464 MHz, and 779 MHz to
    928 MHz

    In other  project my partner have to used the CC1101 but we will  need to do other aplicattion. And we need to use  the CC430F5133X  bacause have the RF tranceiver core. But the performance about the antenna is very poor. I refer to the Design Note DN024.

    I do not know about the steps for the release in TI but I would like informations about your design becuase in your post you wrote about the size of the pcb and this information is very interesting for us, such the gain, and  the test and other this in your  design.

    And thanks your answer.

    Best Regards.

     

  • Hi RRS,

    Did you end up finishing the designs for the 433MHz antennas?

    I'm especially interested in the 1/8 wave antenna.

    Thanks, V.

  • Hi,

    For antenna advice and examples, I suggest that you take a look at our antenna kit http://www.ti.com/tool/cc-antenna-dk and our antenna selection guide http://www.ti.com/litv/pdf/swra161b. These will provide you with the necessary information regarding several possible antenna solutions. For a PCB antenna at 433 MHz, you can also look at the one we use an our value line ref design boards, http://www.ti.com/tool/cc110lem-433-rd.

     

    Charlotte

  • Please provide me the design note for designing the antenna at 433MHz frequency also I need the complete design for 433MHz  frequency I need to design PCB antenna so please help me in designing the PCB antenna for 433MHz frequency as soon as possible.

  • This is very interesting. Is this design now available for 433?
  • If you are looking for a 433 MHz PCB antenna please refer to CC1200EM reference design. Copy the antenna and the place holders for impedance matching (ANT1, ANT2, and ANT3 in the schematic). See http://www.ti.com/tool/CC120XEM-420-470-RD
  • hi,

    what's the thickness of this EVB CC1200EMK-420-470?

  • See the readme file in 

    also see board #4 in www.ti.com/.../swra496.pdf

  • cool, board #4 is what I'm looking for. Is there any detail doc for it? Many thanks.
  • The measurement report I linked to should contain all details required and is the documentation we have.
  • Mine measures 0.0625"