Home product directory topics notepad back issues rf blog. Trying to obtain phase angle using ad 8302 phase detector chip. Attempting to build a low cost vector network analyser josh. Features ships with required tools accessories other tools blog posts discussions. The ad8302 is a fully integrated system for measuring gainloss and phase in numerous receive, transmit, and instrumentation applications. On the first page, it says that the ad8302 includes a phase detector of the multiplier type. The ad8302 includes a phase detector of the multiplier type, but with precise phase balance driven by the fully limited signals appearing at the outputs of the two logarithmic amplifiers. Ad8302 signal at vphs phase detector output of same frequency. The stripline detector and bandpass filters are external to the phase detector receiver. Ninguna categoria gain and phase detector based on the analog devices ad8302 chip. In this paper the possibility of constructing a pll without the use of frequency. The voltage outputs of the ad8302 are routed to the analog in connector of the arduino base board. This device can be used from low frequencies up to 2.
Boonton4500b, which has, according to its manual 14, a vswr of 1. It is a fully integrated rf ic for measuring amplitude and the phase between two independent input signals. The data acquisition is controlled by using arduinonano 3. Fpga implementation of a control system for the lansce. It is a fully integrated system for measuring gainloss and phase in numerous receive, transmit and instrumentation applications. The device can be used from low frequencies up to 2. Another valuable type of rf detector also using computation is. As the name suggests, it amplifies the signal, which allows devices of this class to measure small signals, and it demodulates the alternating rf waveform to a slowlyvarying quasidc output. They are fed to the ad8302 to generate gain difference and phase difference voltages. Accurate gainphase measurement at radio frequencies up to 2. The ac coupled input signals can range from 60dbm to 0dbm in a 50ohm system, from low frequencies up. But on page 15, the phase detector is said to be an xor digital type. Buy ad8302 evalz analog devices gain phase detector, evaluation board.
It requires few external components and a single supply of 2. The eval ad8302 ardz shield illustrates the functionality of the ad8302, a gain and phase detector which operates for frequencies up to 2. To resolve the phase sign, the vna instrument switches the reference input to the detector between an in phase i and quadrature phase q reference signal and measures the detector output for both conditions. Mixers as phase detectors most systems which require phase information use mixers somewhere in the measurement or comparison of the phase information. To accomplish that task, the magnitude and phase of the input impedance are detected by the ic ad8302 which is commonly used for the detection of the gain and phase of radio frequency signals 24. By using the dds signals as reference, the output voltages of the detectors relate directly to the response of the dut. This type of phase frequency detector is widely used in many circuits because of its performance and ease of design and use. Ad8302 logarithmic vide o detector and phase detector hmc 439 digital phase detector rf cavity lo 1 if optional downconverter ampl.
Pdf an experimental measurement of simple chip ad8302. Rf phase detectors are designed to compare the phase or magnitude relationship between two incoming rf signals. No license is granted by implication or otherwise under any patent or patent rights of analog devices. The circuit has a 10 pf capacitor on the input rf, in series with a 10 ohm, 2 watt carbon composition resistor to ground. For example, it can be used for the superheterodyne microwave. Highly sensitive simple homodyne phase detector for. Investigation of rf direct detection architecture circuits. Improve ad8302 with phase shifting pdf file describing a method to use phase shifting circuitry to improve the accuracy of the ad8302 phase magnitude detector, as well as to determine the sign of the. Ad8302aruz analog devices, rf detector ic, 0 hz to 2.
Ad8302evalz evaluation board, ad8302 rfif gain and phase. The master rf oscillator signal was compared to the signal transfered over the 360m long compensated optical link with an idependent phase detector built on purpose in different technology gilbertcell ad8302 from that used in the link electronics doubly balanced diode mixers. Remotely operated reflectometer the ohio state university. The module provides three rf phase detectors based on the analog devices ad8302. The outputs provide an accurate measurement of either gain or loss. A simple highprecision 2port vector analyzer ieee xplore. Analog devices ad8302 rf gain and phase detector measures phase angle in a 0 to 90 degree range. I am trying to use the ad 8302 phase detector chip to obtain phase angle between antennas receiving a rf signal due to the vertical separation of the antennas.
Thus, the phase accuracy measurement is independent of signal level over a wide range. Magnitude and phase detection module ad8302 specifications 9 12. The phase measurements were obtained very quickly without the use of. The ad8302 can also measure the phase difference between two signals, from low. Ade1 mixer as phase detector some experiments using the ade1 mixer as a phase detector, and potentially as a phase and magnitude detector. The phase detection system is basically partitioned into subsystems, as shown in figure 5 4. The ad8302 includes a phase detector of the multiplier type, but with precise phase balance, driven by the fully limited sig. Ad8302 gain and phase detector microchip from analog. Chakrabarty 349k pdf characterization of the fast phase detector in the booster lowlevel rf system 559k pdf ad8302 in radio astronomy applications. A lowcost 100 mhz vector network analyzer with usb.
The block diagram and designed performance of the new phase detector nim module are shown in figure 2. Rf phase detector using an ad8302 overview this is a simple project for a rf phase detector which can be used at frequencies up to 2. Ad8302evalz analog devices, evaluation board, ad8302 rf. Calibration against reference, short, open and 50 ohm load. Phase detection using an analog devices ad8302 evaluation board the superheterodyne microwave interferometer for line average plasma electron density measurements, by y. The plasma used to test the phase detection system was a microwave plasma discharge. Operation of rf detector products at low frequency. Multichannel rf supervision module for thermal magnetic.
Booster main injector phase lock divideby16 phase error. Would be interested in other methods of resolving phase. The accoupled input signals can range from 60 dbm to 0 dbm in a 50. Low level rf system development for the superconducting. The module has also been laid out so it can also be mounted in a nim module. Ad8302 signal at vphs phase detector output of same. Hardware is made by a ad8302 return loss phase detector with a dds. Observing the phase or magnitude of two rf signals incoming and. The tuner picks up the transmit rf signals voltage and current using its coupler module current is picked up via toroidal core current transformer, and the voltage is picked up via a coupling capacitor. Common configuration the use of ad8302 for gain and phase. The ad8302 integrates two identical logarithmic detectors on a single chip, each having dynamic range of 60 db, a digital phase detector, and circuits used for amplitude and output scaling fig.
Use of phase shift to resolve sign ambiguity and improve accuracy in the ad8302 phase detector sam wetterlin 32207 the ad8302 can be used as a vna phase detector by sending it a reference signal and a phase shifted version of that signal. Analog devices ad8302evalz, ad8302 rfif gain phase detector. Science in electrical engineering with honors distinction in research in the. The ad8302 includes a phase detector of the multiplier type, but with precise phase balance, driven by the fully limited signals appearing at the outputs of the two logarithmic amplifiers. Pdf phase detection using ad8302 evaluation board in the. Accurate gainphase measurement at radio frequencies up. The ad8302 ic integrates two logarithmic detectors, each with a 60db dynamic range, plus a linear multiplier and circuits used for amplitude and output scaling, onto a single ic. The ac coupled input signals can range from 60dbm to 0dbm in a 50ohm system, from low. Mar 01, 2001 the ad8302 device is a new type of detector that enables users to measure the ratio difference in decibels between two input signals. This component is the only component needed for the measurement besides the power supply. As might be expected for such a simple circuit, there are a few drawbacks to using an xor phase detector.
Trying to obtain phase angle using ad 8302 phase detector. The detectors measure the difference in phase and magnitude of an input signal compared to a reference signal. A2 the ad8302 phase response rounds near the ends because internally the exor pulses are getting narrow. The pcb circuit described in this report, provides the ad8302 with all. Ad8302 pdf, ad8302 description, ad8302 datasheets, ad8302. As the name suggests, it amplifies the signal, which allows devices of this class to measure small signals, and it demodulates the alternating rf waveform to a.
The evalad 8302 ardz shield illustrates the functionality of the ad8302, a gain and phase detector which operates for frequencies up to 2. In designing illrf, if rf signal phase detected by signal processing in the processor. Nov 11, 2016 i have been confused with the phase detector definition in ad8302 datasheet. The center of this network was one input to the ad8302. I want to use the phase angle to calculate the distance from the transmitter to the receiving antennas that are placed on an upright wooden platform. Practically, however, mixers often display some very nonideal characteristics e.
The core of this system is ad8302, which is an ifrf gain and phase detector integrated circuitic. Analog devices rf if gain phase detector evaluation board. Intelligent lowlevel rf system by nondestructive beam. The ad8302 includes a phase detector of the multiplier. In this paper, the adis singlechip silicon bipolar devices rf if gain and phase detector ad8302 is used as a core components in a wideband amplitude ratio and phase difference measurement system. Another valuable type of rf detector also using computation is the demodulating logarithmic amplifier. Figure 2 shows the block diagram of the gain and phase detector with its auxiliary. Nov 01, 2007 in view of the problems associated with the conventional phase detector, the technique for phase detection by using the ad8302 evaluation board is strongly recommended. Jan 22, 2021 ad8302 is already quite sensitive, so usually no need to enhance it any further.
Phase detection using ad8302 evaluation board in the. The ad8302 evalz is an evaluation board for ad8302 rf if gain and phase detector. Ad8302 evalz is a 4layer, fr4based printed circuit board. Analog devices ad8302evalz, ad8302 rfif gain phase. Ad8302 datasheet, ad8302 datasheets, ad8302 pdf, ad8302 circuit. Theoretically, any mixer with a dc coupled port could be used as a phase detector. Buy now technical documents video features kit contents overview. Antenna analyzer together with antenna under test is rf transmitter unle. The ad8302 includes a phase detector of the multiplier type, but with precise phase balance driven by.
A attached is one way of detecting positive or negative phase difference. The demand for analysis and measurement equipment for microwave device is rather. The phase detector is based around two d type flip flops and an nand gate, although there are a number of slightly different variants. The phase detector is sensitive to the clock duty cycle. This allows the rf power detector s output voltage to be easily digitized and processed by the arduino base boards integrated sixchannel adc. The ac coupled input signals can range from 60dbm to 0dbm in 50 ohm system from low frequencies up to 2. Highly sensitive simple homodyne phase detector for ultrasonic. The obtained signals are shown in figure 2 and the amplitude and phase stabilities on the flattop are 0. Using the following formula to find the phase shift. The higher the rf input frequency, also the narrower, hence more rounding for higher rf frequencies. For the max dynamic range for swr, need the forward near max at ad8302 0 to 10dbm. Sep 12, 2014 the ad8302 is a fully integrated rf ic for measuring amplitude and the phase between two independent input signals. However, in this design, the signal processing is eliminated and rf phase is detected by a special ic which is. The first phase detector notes when the slope of this signal switches from positive to negative and resets the divide by 32 high speed ecl counters that divide the booster rf and the mi rf.
Ad8302evalz evaluation board, ad8302 rfif gain and. Sold by partgryt and ships from amazon fulfillment. Xor phase detector response waveforms it can be seen that using these waveforms, the xor logic gate can be used as a simple but effective phase detector. The lower frequency outputs of the two counters are then compared using a second phase detector. The receiver comprises a summing network, phase detector, and control and regulation boards. The phase and gain output voltages are simultaneously available.
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