Shared Projects by BackHive

A 4 Way antenna switch with bias-T power to LNA at broadband antenna. Each of the 4 RF outputs has provision for an LTCC filter to allow targeting of individual bands of interest.
B.O.M.:
1. 1 X ADG904 or ADG904-R TTSOP-20
2. 4 x PESD5V0X1BT SOD323
3. 1 x AMS1117-5V0 SOT223
4. 1 x AMS1117-1V8 SOT223
5. 2 x 47K Resistors 1206
6. 1 x 1K Resistor 1206
7. 1 x 3mm LED
8. 3 x 100p Capacitor 1206
9. 3 x 100n Capacitor 1206
10. 1 x 1n Capacitor 1206
11. 5 x SMA Female PCB edge Connectors
12. 1 x 4 way dual rotary switch

EME103B L/S-Band LNA PCB

BPF w PThru

Cheb Bandpass Filter 2

A Low Noise Amplifier (PSA4-5043+ or similar) for SDR use, intended to be remotely located at the antenna (so powered up the coax cable using a bias-T). The PCB includes provision for various SAW and LTCC pre-filters (or a zero ohm link), a 5V regulator (if needed), various BNC and SMA types of connectors and a miniature relay module which enables use of the antenna (no LNA or filter) when the pcb is not powered . The PCB will slide perfectly into a SZOMK AK-C-B7 aluminium enclosure.. (search google or aliexpress.com), just drill holes in the endplates for your chosen connectors.