---
# System prepended metadata

title: Untitled

---

**Phased Array Antenna @ground Station**

1.StarLink's Parameter_1
![](https://i.imgur.com/m2I4cPn.png)



2.Link Budget Analysis-TX
![](https://i.imgur.com/WXBAdnb.png)

3.Link Budget Analysis-RX
![](https://i.imgur.com/QM8idg0.jpg)

4.Simulations(Matlab)
System Block Diagram

for the maximum distance (if height at least 650km)


![](https://i.imgur.com/eVRu08P.png)

(4.1)G1->S1 
(4.1.1)
![](https://i.imgur.com/CCOVJRj.png)

(4.1.2)![](https://i.imgur.com/J3C46YH.png)

(4.1.3)![](https://i.imgur.com/SxegDIt.png)

(4.1.3)LinkBudget View
![](https://i.imgur.com/NVDrYgj.png)


Respect to renesa's design
*Formula: (based on P.618 LOSS standard)
Example for FSPL calculation:
FSPL = (4πdf/λ)^2

where:
d = distance between the transmitter and receiver (in meters)
f = frequency (in Hz)
λ = wavelength (in meters)

Assuming a frequency of 12 GHz (which is within the Ku-band frequency range typically used for satellite communications), we can calculate the wavelength as follows:

λ = c/f
= 3x10^8 / (12x10^9)
= 0.025 meters

where c is the speed of light.

Then, using a distance of 600 km (600,000 meters), we get:

FSPL = (4πdf/λ)^2
= (4π x 3x10^8 x 600,000 / 0.025)^2
= 142.9 dB

(4.1.4)based on 14 GHz
λ = c/f
λ = (3x10^8) /(14x10^9)
  = 0.0214
Phased Array Spacing, We use 1/2λ 
Spacing =0.0107(meters)

(4.1.5)BPSK
![](https://i.imgur.com/MEE8J18.png)
DDS frequency resolution = (DDS clock frequency) / (2^16)
if using QPSK, the bitrate will be double.

4.1.6 Slant Range Table
(1)500 KM
![](https://i.imgur.com/tTnRCKd.jpg)
(2)600 KM
![](https://i.imgur.com/C9oN7qj.jpg)
