![]() Do this for two frequencies: 9 GHz and 11 GHz. Since the voltage minima are known to occur at spacings of λ g /2, the guide wavelength can be determined. Note that voltage minima are more sharply defined than voltage maxima, so the minima positions lead to more accurate results. Adjust the SWR sensitivity for a reading near midscale, adjust the carriage position to locate several minima, and record these positions from the scale on the slotted line. Place the blank flange on the load end of the slotted line. Be sure to detune the wavemeter after frequency measurement. The wavemeter is a tunable resonant cavity, and is used by tuning it until a dip is registered on the SWR meter the frequency is then read from the scale of the wavemeter. Measure the frequency with the wavemeter. Adjust the gain knobs of the SWR meter until the needle moves near maximum (i.e., to the right). Set the source to continuous wave (CW) at 9 GHz with power 0 dbm and enable the RF output and 1 khz modulation. Measurement of Guide Wavelength: First you will measure and verify the signal frequency and wavelength. We are using X-band waveguide, with a=0.9", and a recommended operating range of GHz for dominant mode operation. Setup: Set up the equipment as shown below. Equipment Needed: X-band signal generator with 1 khz pulse modulation capability HP 415E SWR meter coax-to-waveguide adapter waveguide isolator cavity wavemeter precision adjustable attenuator slotted line and detector waveguide matched load waveguide section (1 m long) fixed waveguide attenuator (3 to 10 db) slide-screw tuner blank waveguide flange Unknown load 1Ģ 1. If the power level is too high, the small signal condition will not apply for very low power, the signal will be lost in the noise floor. The detector diode must operate in the square law region for good behavior and accurate results. Make sure that you understand the difference between "guide wavelength" and "wavelength" (see equation 3.87). Before doing the experiment, read The Slotted Line in section 2.4 of the text. While the slotted line is cumbersome to use and gives less accurate results when compared with the automated vector network analyzer, the slotted line is still the best way to learn about standing waves and impedance mismatches. This experiment also introduces the student to common waveguide components such as waveguide-to-coax adapters, isolators, wavemeters, slide-screw tuners, detectors, and attenuators. The 415E has scales calibrated in SWR, and relative power in db. To obtain good sensitivity, the RF signal is modulated with a 1 khz square wave the SWR meter contains a narrowband amplifier tuned to this frequency. This signal is measured with the HP 415E SWR meter. The diode operates in the square-law region, so its output voltage is proportional to power on the line. Slotted lines can be made with any type of transmission line (waveguide, coax, microstrip, etc.), but in all cases the electric field magnitude is measured along the line with a small probe antenna and diode detector. The Slotted Line Introduction: In this experiment we will use a waveguide slotted line to study the basic behavior of standing waves and to measure SWR, guide wavelength, and complex impedance. Please contact us today with your requirements.1 ECE 584 Microwave Engineering Laboratory Experiments 1. Distribution types of slots: parallel, crisscross, spiralīS1387,API 5L, API 5CT,ASTM A53,ASTM A252,EN10217,EN10219.Categories of pipes: petroleum casing pipe, oil pipe.High rigidity, high intensity, excellent anti-corrosion and even distribution of pressure.We offer slotted liners in wide range of slotting patters to satisfy the requirement for different open area.The slotted liner is a robust and cost-effective solution for long completions or low productivity wells.Slotting Patterns: Line slot pattern, staggered slot pattern, multiple staggered slot pattern. Working Principle: The slotted liner screen works by allowing certain particle size coming through the surface with crude oil while keeping the bigger size sand staying outside, and thereby the anti-sand purpose is achieved. This type of slotted product is commonly used in sand control devices, especially useful for horizontal wells. Its major function is to prevent rock pieces dropping into the water or the oil well. Slotted liner is actually a kind of sand control screen, chiefly used as the water and oil reservation layer for sand control. ![]() ![]() Perforated Stainless Steel Milling Screen.Perforated Screen Sheet in Stainless Steel.Perforated Stainless Steel Air Curtain Screen.Stainless Steel Perforated Strainer Basket.Perforated Stainless Steel Sheets for Steam Strainers.Perforated Sheet in Aluminum Powder Coated Black.Stainless Steel Staggered Sheet in Coil.
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