CHEMANDY ELECTRONICS Suppliers of the unusual

Transmission Line Kit in Mini FLEXI-BOX


Transmission Line Kit in Mini Size Box
Insertion Loss < 1.0 dB to 3 GHz with SMA
Insertion Loss < 0.8 dB to 2 GHz with BNC
Return Loss > 15 dB
Impedance 50 Ohms
Box Dimensions
50 mm x 35 mm x 23.5 mm


From GBP £19.39 + Connectors
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The price of the Transmission Line Kit in the Mini Size FLEXI-BOX is dependant on the connectors required. To find the price for your connector preference or to make a purchase, select your connector requirements in the boxes beside the photograph below and then select "Add to Cart". 


    [Photograph of Transmission Line Box showing connectors]  



 This is a small FLEXI-BOX with a transmission line PCB which has a 50Ω track (coplanar waveguide with ground) running from one end connector to the other. Either side of the track is a gap of approximately 1.5 mm. This gap is small enough for 0805 surface mount components to be mounted to ground. The use of surface mount components giving good high frequency characteristics. By using a craft knife to cut the track as required, many different circuit configurations can be achieved. The process for building a prototype in the FLEXI-BOX is illustrated in the Building a HF amplifier in a FLEXI-BOX Part 1. The use of surface mount components gives good high frequency characteristics. The track on the PCB provided gives good performance up to 3.0 GHz with SMA connectors and up to 2.0 GHz with BNC connectors, as can be seen in Figures 1 & 2.

   A selection of escutcheon drawings are available for downloading as .zip or .bmp files.


[Graph of transmission line insertion loss]

Figure 2

[Graph of transmission line return loss]


 Further kits are available with dedicated PCB's. Some kits have a write up and some have calculators. This enables values to be easily selected for custom performance.

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