Ka Band Satellite Link Budget

The satellite has limits in both antenna gain and available power.

Ka band satellite link budget.

Uplink from gateway bw 1030 mhz. Because of this the most important parameter for the forward link is the downlink. Ka band satellite communications link budget trade off analysis mitigation technique muche mor than at lower frequencies. Access and vsat data services the link budgets are usually constrained by the small size of the terminal antenna 74 to 120cm.

This is a generic simulation of a satellite with ka band spot beams with multiple inbound carriers from the vsat remotes. Software based application for satellite link budget analysis at ka band was developed by mebrek et al 2012. It is therefore important that there is appropriate planning for the implementation of well designed ground systems network links reliability and resources so as to mitigate these adverse weather effects. Clearly high throughput satellites hts whether ku band or ka band have much higher gain antennas and also much more available power due frequency reuse offering many times more capacity than a wide beam.

Front view of the 70 m antenna at goldstone california. Return link from vsat remote to the teleport. Those are transmitting power and receiving power calculations. Generic ka band link budget.

The default figures refer to a 4mhz wide carrier from a remote site to the hub. 23 46 critical points in a satellite link received power noise signal to noise ratio conclusions friis formula antennas polarization propagation humsat d. Tooway out link budget outlink from gateway hub to remote customer vsat site. Atmospheric losses at 437 mhz minimum maximum minimum maximum elevation l atm db l atm db l sci db l.

First let us discuss the basic terminology used in link budget and then we will move onto explain link budget calculations. In order to choose the right ka band satellite operator to best meet yours and your customers requirements it is. It is these differences that i will explore to characterize their. At each earth station there is a 70 meter diameter antenna with the capability of using the ka band 26 5 ghz 40 ghz for uplink and downlink satellite communication 1.

Marie rieche et al 2014 worked on the modeling of land mobile satellite channel considering the terminal s driving direction based on the channel between a satellite and a mobile terminal. The outlink comprises 4 carriers per beam comprising 3 carriers of 52 msps plus 1 carrier of 40msps making a total used bandwidth of approx 206 mhz out of the allocated 236 mhz per beam. Operation in ka band is preferable because path loss decreases as frequency increases.