VikramSAT RF Board

VikramSAT RF Board is the main communications board for the 'vikramsat', which is a 2U cubesat that me and my teammates are trying to make. This board also includes the RP2350A as the main data processing IC along with multiple interfaces.

The RF transmitter on this board has an output Power of 4 Watts and it is not recommend to use this without a ham radio license. although you can receive data just fine.

It uses the CC1125 RF Transceiver from Texas Instruments as it's Transceiver and GSQ5111 Power Amplifier and it operates in the 70cm band. the RP2350A acts as a control IC for the CC1125 and this simplifies the process for the OnBoard Computer(the OBC of the cubesat)

Why I chose to make this project

Me and my friends got an idea of making a cubesat about this time last year, and started learning all the electronics and design, and i am the leader of the group and i design the communications part. I chose to make this project in highway because this was the perfect time, as i was thinking about starting to make the pcb anf highway was announced, and surprisingly, only 4 hours are left from now until highway ends forever!

Images

Kicanvas Link: Here




Files now have .STEP files!

BOM

Final Breakdown at the bottom

Id	Designator	Designation	Footprint	DNO	Price	Quantity	Amount	Link
1	C1, C2, C32, C33	15p	402	Yes	0	4	0	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Murata-Electronics-GJM1555C1H150FB01D_C441742.html
2	C10	10n	402	No	0.0008	100	0.08	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_CCTC-TCC0402X7R103K500AT_C688874.html
3	C11, C12, C13, C15, C16, C3, C4, C5, C6, C7, C9	47n	402	No	0.0008	100	0.08	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_CCTC-TCC0402X7R473M250AT_C5142571.html
4	C14	220n	402	No	0.0016	100	0.16	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_HRE-CGA0402X5R224K100GT_C7503518.html
5	C17, C18, C19, C21, C34, C35, C36, C39, C40	4.7u	402	No	0.014	50	0.7	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Chinocera-HGC0402R5475M250NTEJ_C22367824.html
6	C20, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31	100n	402	Yes	0	22	0	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Murata-Electronics-GRM155R61H104JE14D_C426067.html
7	C37, C38	100nF	402	Yes	0	4	0	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Murata-Electronics-GRM155R61H104JE14D_C426067.html
8	C41, C42	10u	805	Yes	0	2	0	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Samsung-Electro-Mechanics-CL21A106KBYQNNE_C2932476.html
9	C43	1200p	402	No	0.0009	100	0.09	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_HRE-CGA0402X7R122K500GT_C22435964.html
10	C44	5p	402	No	0.0009	1	0.0009	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_HRE-CGA0402C0G5R0C500GT_C41361096.html
11	C45, C46, C47, C48, C49	220p	402	No	0.0015	5	0.0075	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Walsin-0402N221J500CT_C301973.html
12	C8	1n8	402	No	0.001	100	0.1	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_CCTC-TCC0402X7R182K500AT_C696873.html
13	D1	LED	402	Yes	0	1	0	https://lcsc.com/product-detail/LED-Indication-Discrete_Everlight-Elec-16-213-GHC-YR1S1N-3T_C2980183.html
14	D2, D3	D	402	No	0.17	5	0.85	https://lcsc.com/product-detail/Schottky-Diodes_onsemi-NSVR05F40NXT5G_C604383.html
15	DP1, DP2, DP3, DP4, DP5	~	Debug Pad	0	0	5	0	-
16	IC1	CC1125RHBR	QFN50P500X500X100-33N-D	No	3.0257	2	6.0514	https://lcsc.com/product-detail/RF-Transceiver-ICs_TI-CC1125RHBR_C133234.html
17	IC2	BALF-SPI2-02D3	BALFSPI202D3	No	0.41	2	0.82	https://lcsc.com/product-detail/RF-Filters_ST-BALF-SPI2-02D3_C2688704.html
18	IC3, IC4	4259-63	PE4259	No	0.6885	2	1.377	https://lcsc.com/product-detail/RF-Switches_pSemi-PE4259-63_C470892.html
19	J1	Conn_Coaxial	SMA_Amphenol_901-143_Horizontal	No	0.4585	2	0.917	https://lcsc.com/product-detail/Coaxial-Connectors-RF_BAT-WIRELESS-BWSMA-KWE-Z001_C496551.html
20	J2	Conn_01x03_Top_Bottom	PinHeader_1x03_P2.54mm_Vertical	Yes	0	1	0	-
21	J3	Conn_02x20_Top_Bottom	PinHeader_2x20_P2.54mm_Vertical	No	0.9305	2	1.861	https://lcsc.com/product-detail/Female-Headers_ZHOURI-PC104-2-20_C5307344.html
22	J4	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_XKB_U262-16XN-4BVC11	Yes	0	1	0	https://lcsc.com/product-detail/USB-Connectors_SHOU-HAN-TYPE-C16PIN_C393939.html
23	L1	3.3u	IND-SMD_L2.0-W1.6_AOTA-B201610S3R3-101-T	No	0.28	5	1.4	https://lcsc.com/product-detail/Power-Inductors_ABRACON-AOTA-B201610S3R3-101-T_C42411119.html
24	R1	0	402	0	0	1	0	Direct Bridge
25	R10, R11, R8, R9	10k	402	Yes	0.0278	20	0.556	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Vishay-Intertech-RCS040210K0FKED_C3020235.html
26	R12, R6, R7	1k	402	No	0.0005	100	0.05	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_FOJAN-FRC0402J102-TS_C2906899.html
27	R2	56k	402	No	0.0004	100	0.04	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_FOJAN-FRC0402J563-TS_C2906955.html
28	R3	33	402	Yes	0	1	0	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RT0402BRD0733RL_C852729.html
29	R4, R5	27	402	Yes	0	2	0	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_PANASONIC-ERJ2GEJ270X_C278580.html
30	R6,R7	5.1k	402	Yes	0	2	0	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_PANASONIC-ERJ2RKF5101X_C278598.html
31	SW1	SW_Push	SW_SPST_PTS810	No	0.81	2	1.62	https://lcsc.com/product-detail/Tactile-Switches_C-K-PTS810SJS250SMTRLFS_C221897.html?s_z=n_pts810
32	U1	RP2350A-QFN60	RP2350A_QFN-60_EP_7.75x7.75_Pitch0.4mm	No	1.48	3	4.44	https://www.silverlineelectronics.in/
33	U2	W25Q128JVS	SOIC-8_5.3x5.3mm_P1.27mm	No	1.77	2	3.54	https://lcsc.com/product-detail/NOR-FLASH_Winbond-W25Q128JVSIM_C2613930.html?s_z=n_W25Q128JVS
34	U3	GSQ5111	QFN-16_L3.0-W3.0-P0.50-TL-EP1.65	No	4.75	2	9.5	https://lcsc.com/product-detail/RF-Power-Amplifiers_GPowerTek-GSQ5111_C41410391.html
35	U4	SK5129	DFN-6_L1.6-W1.6-P0.50-BL-EP1.0	No	0.1685	3	0.5055	https://lcsc.com/product-detail/Low-Noise-Amplifiers-LNA-RF_Suntek-SK5129_C5120312.html
36	U5	AMS1117s-3.3	SOT-89-3	No	0.1057	5	0.5285	https://lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_JSMSEMI-AMS1117S-3-3_C917152.html?s_z=n_ams1117s
37	Y1	Crystal_GND24	Crystal_SMD_3225-4Pin_3.2x2.5mm	No	0.45	2	0.9	https://lcsc.com/product-detail/Crystal-Oscillators_Shenzhen-SCTF-Elec-SX3M40-000M20F30TNN_C2901588.html?s_z=s_Crystals%252C%2520Oscillators%252C%2520Resonators%257CCrystal%2520Oscillators
38	Y2	Crystal_GND24	Crystal_SMD_3225-4Pin_3.2x2.5mm	No	0.43	2	0.86	https://lcsc.com/product-detail/Crystals_ABRACON-ABM8-272-T3_C20625731.html?s_z=n_abm8-t272
	Shipping	3.74					37.0348
	Merchandise total	37.03
	pcb+stencil(jlcpcb)	34.57
	Total	75.34