A wonderful thing is happening in the UK electronic component manufacturing sector. People are buying British again. What is causing this phenomenon? Patriotism, marketing, government policy, green considerations, transport costs, communication issues or long delivery lead times?
Stripline Directional Couplers, Low Loss Airline Directional Couplers and High Directivity Directional Couplers - How much power can they handle?
The reason is that directional couplers are frequently used for load-pull testing of amplifiers or monitoring a signal after a power amplifier. In either case, the directional coupler will be placed as close to the output of the power amplifier as possible, which means it must perform within spec at high operating powers.
Despite the importance of directional coupler performance under high power inputs, most directional coupler vendors offer a single number without any background or context. As we will show in this post, the static value commonly provided for the power handling of a directional coupler is an oversimplification of the matter.
Ciao Wireless introduces it's new line of Ultra-Low Noise Amplifiers with Noise Figures as low as 0.30dB typical, between 1.0-3.1GHz. Ciao's designs feature multiple frequency and gain options whilst maintaining Ultra-Low Noise Figures between 0.3dB to 0.4dB. All models inlcudee internal voltage regulationa nd reverse polarity protection. The Ciao Ultra-Low Noise Amplifier product line, like all of Ciao's RF & Microwave Amplifier designs, are guaranteed to be 100% unconditionally stable. Ciao conducts 100% unconditional stability testing as a part of it's normal acceptance test procedure for every product shipped. Units can be customised with No NRE to meet customer's exact requirements if the standard catalogue models do not "exactly" fit any particular need. "Custom or Special" models are usually still available within 1-2 weeks ARO.
The amplifier line offers multiple gain options: 20, 25, 30 and 35dB with flat response, typically less than ±3.0dB over the band. Amplifier output power is typically +15dBm minimum with a two-tone, third-order intercept of +23dBm and non-harmonic spurious levels better than -60dBc. All units are well matched, with input VSWR typically 1.6:1 over the band (2.3:1 maximum) and output VSWR 1.8:1 (2.3:1 maximum). Typical noise figure is as low as 4 to 5dB at +23°C. The design features an integrated output power detector that covers 10MHz to 40GHz and has the flexibility to tailor the output voltage to meet the customer’s desired voltage vs. output power. The detected output is scalable up to a 10dB dynamic range with very repeatable performance and settling times typically 50µs or less. Units can be ordered without the output detector, if only the amplifier is desired. The detector can also be ordered separately, without the amplifier, for applications that require a small, competitively priced power detector covering 10MHz to 40GHz. The detector can be optimized over a narrower frequency band. The amplifier with the integrated detector assembly occupies a small footprint, with 2.9mm connectors and hermetic feedthroughs. Hermetic sealing is available, and the line is qualified for all commercial and high-rel applications. The nominal operating temperature range is -20° to +70°C, although the design can be optimized for alternate operating
conditions. These units require +12 to +15V bias and have integrated voltage regulation and reverse polarity protection.
Custom MMIC - Our MMICs can be Qualified for Space to MIL-PRF-38534 Class K & MIL-PRF-38535 Class S Screening—and Many of Them Already are...
This includes visual inspection to MIL-STD-883 Method 2010B Class S, 100% element electrical RF test, and wafer lot qualification testing (per the requirements of MIL-PRF-38534 for MMIC devices). Custom MMIC has the option of performing Lot Acceptance Testing internally or via approved subcontractors. Laminar flow hoods are utilized for testing of wafers and visual inspection in a Class 100 cleanroom environment.
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