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- Spectrum Analyzer • Measurement Receiver ➜
- A DC-199 MHz Spectrum Analyser 'VISIONARY' with Si4432
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- Levelmod - A DC to Daylight Microwave Powermeter
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- DCF-77 Synthesizer. With Arduino. Aka "TimeDuino"
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- PETH-6 Power Supply • ± 15 V, 100 mA
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- VHF/UHF Power Amplifier with the BGD 804 - 860 MHz, 24 V
- VHF/UHF Power Amplifier with the BGY 588N - 550 MHz, 24 V
- VHF/UHF Power Amplifier with the QPA 3314 - 1794 MHz, 24 V
- VHF/UHF Power Amplifier with the QPA 3316 - 1794 MHz, 24 V
- VHF/UHF Power Amplifier with the TAT 8888 - 1000 MHz, 24 V
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- Remembering Robert A. Pease, aka "RAP"
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- A 100 MHz Reference Frequency Add-On, DIL-28 Formfactor
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- The Mobile Emitter
- DDS Synthesizer - with AD9851, ≈70 MHz
- Low Noise DDS Daughterboard - with AD9859, ≈ 160 MHz
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- Universal Frequency Converter with the Si564
- A broadband Phase-Shifter for IQ Mixing Applications (ECL)
- An RF Phase-Shifter for IQ Mixing Applications (LVC)
- Transmod, shifts 6.8±1 GHz to 1.0±1 GHz.
- UpConverter for SDR, Callisto e.a.
- Noisy Things
- Noise • Introduction
- Calibrate your Noise Source. ENR calculator.
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- DIY Noise Source with the BFR92
- DIY Noise Source with 2 x GVA and 2 x PAT - ENR : 12.0 dB
- DIY Noise Source with 2 x GVA-81+ - ENR : 21.43 dB @ 1.0 GHz
- DIY Noise Source with 3 x GVA-81+ - ENR : 24.44 dB @ 1.0 GHz
- DIY Noise Source aka Ghettoblaster 555
- EMI Powerline Schnüffelstück
- How to Measure the Noise Floor of Your Spectrum Analyzer
- Magnetic Field Probe up to 3 GHz
- Noise Figure Measurement using the Gain-Method
- Noise Figure Measurement using the Y-Method
- Quantumoptics Stuff 3599
- QO Basics - Photodiode Things ➜
- Photodiodes for Physicists
- Photodiodes for Engineers, Technicians, ...
- Photodiodes Troubleshooting : The Mobile Emitter
- Photodiode Opamp Amplifier • Transimpedance Amplifier
- LED's ... working like Photodiodes
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- Diodemod : for DC Characterization of Photodiodes
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- Bias - Tee, Broadband and Commercial
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- Lowpass, Highpass using Würth Power Inductors
- Magnetic Field Probe up to 3 GHz
- Prescaler :2 :4 :8 :10 :20 :40 :80 MC12093 MC12095 MC12080
- 6.5 GHz Prescaler :1 - :17 with the HMC705LP4
- 8 GHz Prescaler :80 - :640 with the HMC434 + MC12080
- Resistive Power Split, DC - 3000 MHz, 9.5 dB, 3 Way
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- Ground-Breaker
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- Bi Directional Coupler or Dual Directional Coupler ???
- A Bi Directional Coupler, 1 - 800 MHz, 20 dB
- A Dual Directional Coupler, 5 - 1500 MHz, 10 / 20 dB
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- Understanding Directivity
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7. July 2026
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SWR_Bridge_Trafo.php 4872 Bytes 06-03-2025 12:52:14
A AF/HF Bridge ... with the ADTT1-6+
SWR Measurement • Return Loss Bridge, 15 kHz ... 100 MHz
✈ Circuit Description
For maximum Flexibility, the case has 4 x SMA Connectors to allow for any HF Source, Load, Reference or Measurement Device (Powermeter, Spectrum Analyzer, ...) to be connected. R1 and R2 are 49.9 Ω, 1206, 0.1%, 25ppm (RG3216P-49R9-B-T5).
The ADTT1-6+ is from Mini Circuits.
✈ Performance
Insertion Loss (SRC - MEAS) is -12 dB @ 20 MHz when a Short is connected.
Changing to a Load, the level will drop by an additional 32 dB. This is also called Directivity or sometimes Isolation.
Changing to a Load, the level will drop by an additional 32 dB. This is also called Directivity or sometimes Isolation.
✈ Downloads
✈ Share your thoughts
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t1 = 7299 d
t2 = 319 ms |
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