2 layers41.8 × 13.2 mm
4 layers100 × 65 mm
STS1 GS TRX Switch
SpaceTeam/STS1_GS_TRX_SwitchSimple PCB for transmit/receive switching for our groundstation
- Size
- 100 × 65 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 107
- Nets
- 93
- Pads
- 389
- Tracks, vias
- 327, 593
- Pours
- 32
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Oct 2023
- Updated
- 26 Oct 2025
Overview
STS1 GS TRX Switch is an open-source printed circuit board by SpaceTeam, from the SpaceTeam/STS1_GS_TRX_Switch repository on GitHub, published under the MIT licence. It is a 4-layer board of 100 × 65 mm with 107 parts on 93 nets, routed with 327 tracks and 593 vias.
It is built around the PGA-103+, TSR 2-2450 and TPS54360DDA, with the BTT6050-2EKA, BAS16W and BC847 among its other parts. Its parts include 33 capacitors, 25 resistors, 11 diodes, 9 inductors and 8 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
12
PGA-103+
SOT-89-41.5dB 18dB 23.2dBm 3V、5V 50MHz~4GHz 97mA Linearization design SOT-89-4 RF Amplifiers ROHSMini-CircuitsRF Amplifiers
TSR 2-2450
SIP,14x7.5mm-40℃~+85℃ 1 10.16mm 13.97mm 1mA 2A 410kHz 50mVp-p 5V 6.5V~36V 600uF 7.62mm 94% Short Circuit Protection、Over-temperature protection、Automatic fault recovery、Overload protection Step-down type ±2% SIP,14x7.5mm DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
TPS54360DDA
SOIC-8-EP-40℃~+150℃@(TJ) 1 146uA 2.5MHz 3.5A 4.5V~60V 800mV~58.8V Adjustable Buck Buck Built-in No SOIC-8-EP DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BTT6050-2EKA
DSO-14-EP-40℃~+150℃ 2 50mΩ 5V~36V Active High High Side Switch Overvoltage Protection、Under-voltage lockout、Overcurrent Protection、Over temperature protection、Latch protection、Short-Circuit Protection DSO-14-EP Power Distribution Switches ROHSInfineon TechnologiesPower Distribution Switches
BAS16W
SOT-323Switching DiodesLGE
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
LQW2BASR22J00L
0805220nH 400mA 700mΩ Unshielded Inductor ±5% 0805 Power Inductors ROHSMurataPower Inductors
LQW18AN33NJ80D
06031.1A 110mΩ 33nH Wire-wound inductor ±5% 0603 Power Inductors ROHSMurataPower Inductors
ASPI-4030S-5R6M-T
SMD,4x4mm1.95A 2.6A 5.6uH 65mΩ ±20% SMD,4x4mm Power Inductors ROHSAbraconPower InductorsSF2446E
SMD-45℃~+125℃ 23MHz 3dB 435MHz 46dB、50dB、52dB、54dB、54dB SMD SAW Filters ROHSMurataSAW FiltersSRR1210-270M
SMD,12x12mm27uH 4.2A 40mΩ 5A Magnetic Shielded Inductor ±20% SMD,12x12mm Power Inductors ROHSBournsPower InductorsLQW2BASR39J00L
08051.5Ω 290mA 390nH Unshielded Inductor ±5% 0805 Power Inductors ROHSMurataPower Inductors
README
README.mdGround Station TRX Switch
This boards provides sequencing and switching for transmit and receive path of a satellite groundstation based on two galvanically isolated inputs.
It features an on-board LNA with filter and pre and post filtering for an external power amplifier.
It also provides ~30V switched for the PA derived from one common 48V supply.
It is controlled by an Arduino Nano which is used for timing. It features two high-side MOSFET outputs for enabling a PA and LNA and three coaxial relays for RX/TX switching and antenna grounding (when neither RX nor TX is enabled).
The design was built for around 435MHz but probably is easy to adapt to different frequencies up to 3GHz.
Ordering
The RF design is built for the "standard" 1.6mm thick JLCPCB 4-layer stackup consisting of the following layers:
- 35µm Outer copper
- 210.4µm Prepreg (7628, RC 49%, 8.6mil)
- 15.2µm Inner copper
- 1.065mm Core
- 15.2µm Inner copper
- 210.4µm Prepreg (7628, RC 49%, 8.6mil)
- 35µm Outer copper
For finish please choose ENIG.
License
All files in this repository are licensed under the MIT license EXCEPT for the files in the /3d directory.
- Arduino Nano: By Andrew Whitham (https://grabcad.com/library/arduino-nano--1), noncommercial public use allowed (https://help.grabcad.com/article/246-how-can-models-be-used-and-shared?locale=en)
- TE HF3-53: Copyright TE Connectivity (https://www.te.com/usa-en/product-1462051-2.html)
- Molex 73251-2120: Copyright Molex LLC (https://www.molex.com/en-us/products/part-detail/0732512120)
Parts
107| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R4, R5, R6, R8, R9, R13, R15, R16, R17, R19, R21, R22 |
| 9 | 1µ | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C5, C6, C7, C8, C9, C19, C20, C21 |
| 5 | 10µ | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23, C26, C27, C28, C31 |
| 5 | BAS16W | Package_TO_SOT_SMD:SOT-323_SC-70 | D1, D2, D3, D4, D5 |
| 4 | 100pF | Capacitor_SMD:C_0603_1608Metric | C11, C14, C17, C18 |
| 4 | 100µ | Capacitor_SMD:CP_Elec_10x10 | C22, C29, C30, C35 |
| 4 | 10µ | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1, C24, C25, C36 |
| 4 | M4 | MountingHole:MountingHole_4.3mm_M4_Pad_Via | H1, H2, H3, H4 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R11, R12 |
| 3 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 3 | HF3-53 | Relay_SMD:Relay_SPDT_AXICOM_HF3Series_50ohms_Pitch1.27mm | K1, K2, K3 |
| 2 | 1.8k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R18, R20 |
| 2 | 220nH | Inductor_SMD:L_0805_2012Metric | L3, L5 |
| 2 | 221k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23, R24 |
| 2 | 33nH | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L1, L6 |
| 2 | 5.6µH | Inductor_SMD:L_Abracon_ASPI-4030S | L7, L8 |
| 2 | 7.5pF | Capacitor_SMD:C_0603_1608Metric | C15, C16 |
| 2 | BTT6050-2EKA | btt6050-2eka:Infineon_PG-DSO-14-40-EP_3.9x8.65mm_P1.27mm | U4, U6 |
| 2 | PC817 | Package_DIP:DIP-4_W7.62mm | U1, U2 |
| 2 | SF2446E | saw:Filter_SAW-6_3.0x3.0mm | X1, X2 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C32 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 100p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C33 |
| 1 | 11k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R26 |
| 1 | 120 | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 27µH | Inductor_SMD:L_Bourns_SRR1210A | L9 |
| 1 | 330pF | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | 370k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R25 |
| 1 | 390nH | Inductor_SMD:L_0805_2012Metric | L4 |
| 1 | 48V_Supply | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | J9 |
| 1 | 51nH | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L2 |
| 1 | 600R/0.5A | fbead:Murata-BLM18-0.15-t0.8-0-0-IPC_A | FB1 |
| 1 | 7.5n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C34 |
| 1 | Ant_GND_Sw | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D8 |
| 1 | Antenna | SMA:SMA_Molex_73251-2120_EdgeMount_Horizontal | J6 |
| 1 | Arduino_Nano_v2.x | Module:Arduino_Nano | A1 |
| 1 | CDBC560-G | Diode_SMD:D_SMC_Handsoldering | D12 |
| 1 | From_PA | SMA:SMA_Molex_73251-2120_EdgeMount_Horizontal | J5 |
| 1 | LNA_Sw | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D11 |
| 1 | PA_Pwr | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2 |
| 1 | PA_Sw | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D9 |
| 1 | PGA-103+ | Package_TO_SOT_SMD:SOT-89-3 | U3 |
| 1 | RX_LED | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | J7 |
| 1 | SDR | SMA:SMA_Molex_73251-2120_EdgeMount_Horizontal | J1 |
| 1 | TPS54360DDA | Package_SO:TI_SO-PowerPAD-8_ThermalVias | U7 |
| 1 | TRX_Sw_1 | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D6 |
| 1 | TRX_Sw_2 | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D7 |
| 1 | TSR2-2450 | Converter_DCDC:Converter_DCDC_TRACO_TSR2-xxxx_THT | U5 |
| 1 | TX_LED | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G-5,08_1x02_P5.08mm_Horizontal | J8 |
| 1 | To_PA | SMA:SMA_Molex_73251-2120_EdgeMount_Horizontal | J3 |
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Questions
How big is the STS1 GS TRX Switch PCB?
It measures 100 × 65 mm and has 4 copper layers, 1.61 mm thick.
What parts does the STS1 GS TRX Switch use?
107 parts, built around the PGA-103+, TSR 2-2450, TPS54360DDA and BTT6050-2EKA. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the STS1 GS TRX Switch KiCad files?
From the SpaceTeam/STS1_GS_TRX_Switch repository on GitHub, at the commit this page was made from: the board is STS1_GS_TRX_Switch.kicad_pcb and its schematic STS1_GS_TRX_Switch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STS1 GS TRX Switch design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).