Slotted lines are used for microwave measurements and consist of a movable probe inserted into a slot in a transmission line. They are used in conjunction with a microwave power source and usually, in keeping with their low-cost application, a low cost Schottky diode detector and VSWR meter rather than an expensive microwave power meter.
Slotted lines can measure standing waves, wavelength, and, with some calculation or plotting on Smith charts, a number of other parameters including reflection coefficient and electrical impedance. A precision variable attenuator is often incorporated in the test setup to improve accuracy. This is used to make level measurements, while the detector and VSWR meter are retained only to mark a reference point for the attenuator to be set to, thus eliminating entirely the detector and meter measurement errors. The parameter most commonly measured by a slotted line is SWR. This serves as a measure of the accuracy of the impedance match to the item under test. This is especially important for transmitting antennas and their feed lines; high standing wave ratio on a radio or TV antenna can distort the signal, increase transmission line loss and potentially damage components in the transmission path, possibly even the transmitter.
Slotted lines are no longer widely used, but can still be found in budget applications. Their main drawback is that they are labour-intensive to use and require calculation, tables, or plotting to make use of the results. They need to be made with mechanical precision and the probe and its detector need to be adjusted with care, but they can give very accurate results.
Slotted lines are used for microwave measurements and consist of a movable probe inserted into a slot in a transmission line. They are used in conjunction...
ratio. The most intuitive method uses a slottedline which is a section of transmission line with an open slot which allows a probe to detect the actual...
the simple milled slot of a slotted screw. The Phillips screw design was developed as a direct solution to several problems with slotted screws: high cam...
which has been one of the most popular lines of slot machines), entertainers, and musicians. Multi-lineslot machines have become more popular since the 1990s...
change the overall "slotted" appearance. Factors that have often been looked upon as contributing to the development of slotted dance style include:...
utilization than Slotted ALOHA at 20–36% utilization. The chief difference between Slotted and Reservation ALOHA is that with Slotted ALOHA, any slot is available...
attraction for downtown Las Vegas, and is also the location of the SlotZilla zip line attraction and the city's annual New Year's Eve party, complete with...
A slot canyon is a long, narrow channel or drainageway with sheer rock walls that are typically eroded into either sandstone or other sedimentary rock...
the signal traverses an exponentially tapered pattern via a symmetrical slotline. Vivaldi antennas can be made for linear polarized waves or – using two...
parameters that can be directly measured with an instrument called a slottedline. This instrument makes use of the reflection phenomenon to make many...
not slip out of the fastener as easily as would a Phillips or slotted driver. (Slotted screws are rarely used in mass-produced devices, since the driver...
electricity, creating the famous Scalextric line of slot-guided models, and Victory Industries introduced the VIP line, both companies eventually using the new...
Owen Slot is a British sports journalist and author. He is Chief Rugby Correspondent for The Times. In addition to his own works he was ghostwriter for...
A graveyard slot (or death slot) is a time period in which a television audience is very small compared to other times of the day, and therefore broadcast...
In computer architecture, a delay slot is an instruction slot being executed without the effects of a preceding instruction. The most common form is a...
1978. The first product line of the company developed specifically as a medium-duty truck, the Loadstar was slotted between C-Line pickup trucks and the...
time slotted ALOHA channel with each time slot long enough for a packet transmission time. (A satellite channel using the TDMA protocol is time slotted.)...
submarine to the overwater world. The basic purpose of the SLOT buoy is to establish a line of communication from a single, submerged, usually military...
solely in China, the DS 9 serves as the flagship DS luxury-premium line, slotted above the DS 3, DS 4 and the DS 7 Crossback in size. Originally, the...
Mondeo, the Galaxy was developed alongside the Ford S-Max; the model line is slotted between the Connect and Custom variants of the Ford Tourneo/Transit...
with a series of vertical slotslined up with each card slot. Most expansion cards have a matching metal bracket which slots into one of these openings...
The Scotch yoke (also known as slotted link mechanism) is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion...
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