Tag Archives: High OIP3 LNA 2m

LNAs with built-in bypass relays and RF VOX for 4m 2m 1.25m 70cm bands

In this project we are present a new version of the LNA with bypass relays and RF VOX. This construction is different from the previous version. It has different bypass relays (up to 100 Watts) and RF transceiver control circuit. Area of the application is utilization of the FM transceivers and radio stations (LPD, PMR). It’s possible to use LNA for civil LPD frequency band (433 – 435 MHz) and PMR frequency band (446 MHz) with usage of the feeder and stationary remote antenna. The solutions for other frequency ranges (4m, 2m, 1.25m and 70cm) are also available.

LNA-2m

  • Model: LNA-2m-100W-RF-VOX
  • Active element: PGA-103+
  • RF Power TX mode: 100 Watt (max), 50 Watt RF VOX
  • Gain: 22 dB
  • Noise Figure: < 0.6 dB
  • Output IP3: 38 dBm
  • P input: 21 dBm (max)
  • DC voltage: 12 V
  • DC current: 150 mA
  • Impedance: 50 ohms
  • RF connectors: N-female or SMA-female
  • Dimensions: 110 mm x 43 mm x 20 mm (with connectors)
  • Weight: 0.15 kg

LNA-70cm

  • Model: LNA-70cm-100W-RF-VOX
  • Active element: PGA-103+
  • RF Power TX mode: 100 Watt (max), 50 Watt RF VOX
  • Gain: 20 dB
  • Noise Figure: < 0.8 dB
  • Output IP3: 39 dBm
  • P input: 21 dBm (max)
  • DC voltage: 12 V
  • DC current: 150 mA
  • Impedance: 50 ohms
  • RF connectors: N-female or SMA-female
  • Dimensions: 110 mm x 43 mm x 20 mm (with connectors)
  • Weight: 0.15 kg

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High OIP3 LNA EME ATF-531P8 with BPF filter for 2m 70cm bands

LNA 2m EME

In this project we created all-purpose LNAs for all QSO types (Tropo, Contest, EME, etc.) for 2m and 70cm bands. LNA was designed using ATF-531P8 E-pHEMT with High IP3 (37 dBm). Noise figure is much better than on PGA103+ or SPF5189z for 2m band (< 0.2dB). ATF-531P8 E-pHEMT is more reliable than low power ATF-54143 (SAV-541+). The location of the band-pass filter on LNA’s output allows to suppress the FM band and adjacent bands that close to FM band.

LNA-2m

  • Model: LNA-2m-EME
  • Based on: ATF-531P8
  • Gain: 24 dB
  • Noise Figure: < 0.3 dB
  • Output IP3: 37 dBm
  • Filter BW(-3 dB): 15 MHz
  • P input max: 24 dBm
  • DC voltage: 9 – 12 V
  • DC current: < 140 mA
  • Impedance: 50 ohms
  • RF connectors: N-female or SMA-female
  • Dimensions: 72 mm x 43 mm x 20 mm (w/o connectors)
  • Weight: 0.15 kg

LNA-70cm

  • Model: LNA-70cm-EME
  • Based on: ATF-531P8
  • Gain: > 20 dB
  • Noise figure: < 0.4 dB at 432 MHz
  • OIP3: 37 dBm
  • Filter BW(-3 dB): < 60 MHz
  • P input: 24 dBm (max)
  • Supply operation: 9 — 12 V DC , IDQ < 140 mA
  • Inpedance: 50 ohms
  • RF connectors: N-female (by default) or SMA-female (by request)
  • Dimensions: 72 mm x 43 mm x 20 mm (w/o connectors)
  • Weight: 0.15 kg

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