The Use of the HP Microwave Design System in the WBand Tripler Design
To achieve the maximum conversion efficiency of the tripler described in I he accompanying article, it was necessary to provide a very good match to the diode at the tripler input frequencies 25 GHz to 36.66 GHz . An impedance matching filter was designed using the Microwave Nonlinear Simulator MNS which is a part of Hewlett-Packard's Microwave Design System MDS . The design of the filter took place in three stages Developing and simulating a model of the nonlinear device used for...
A HighSpeed Microwave Pulse Modulator
This optional fast pulse modulator uses an unequally spaced diode topology to achieve a wide bandwidth and a high on-off ratio without resorting to performance-limiting diode saturation. FAST PULSE MODULATION, Option 006 for the HP 8360 synthesized sweep oscillators, offers improved pulse modulation performance over the standard instrument block diagram. In this configuration, the instrument has an additional pulse modulator at the output of the RF deck. Pulse modulating after the YIG...
Modular Microwave Breadboard Svstem
One potential disadvantage of the drop-in assembly methods used for the modspiitter and tow-band microcircuits is that there s no easy way to test the individual circuits within these hybrids With the former design method of placing each circuit in its own package, this was not a problem ir- the new desigr however the circuits are hioden away inside a final large package and it may not even be possible to gain access to both ports of all of the circuits A new technique was needed to test the...
The Use of HP ME in the WBand Tripler Design
The use o' drafting tables oencils and paper for design and drafting at HP is rapidly disappearing and being replaced by computers, displays, and keyboards The primary mechanical design software is HP ME 10 for two-dimensional work and HP ME 30 for solids modeling The package for the W-band tripler microcircuit described in the accompanying article was designed using ME 10 The required views were constructed with exact geometry so that other areas involved in documentation and manufacturing...
Measuring the Modulation Accuracy of tt DQPSK Signals for Digital Cellular
Using digital signal processing techniques, this software accurately verifies the RF performance of digital cellular transmitters conforming to the North American Dual-Mode Cellular System standard. THE HP 11847A W4 DQPSK modulation measurement software performs accurate verification of the RF performance of cellular transmitters conforming to the standard for the North American Dual-Mode Cellular System NADMCSJ. The standard was prepared by the TR 45.3 subcommittee of the Electronic Industries...
A Family of HighPerformance Synthesized Sweepers
Eleven models offer frequency coverage to 50 GHz in coax, extendable to 110 GHz in waveguide with millimeter heads. Swept frequency accuracy is ten times better than previous designs. A menu-based user interface simplifies operation. by Roger P. Oblad, John R. Regazzi, and James E. Bossaller MICROWAVE FREQUENCIES came into general interest with the advent of radar at the begining of World War II in 1939. Signal generators were needed to test and develop these early radar systems. The first...
toGHz HighPerformance MillimeterWave Source Modules
State-of-the-art microcircuit technologies and development tools were employed to produce a W-band amplifier tripler, a V-band amplifier doubler, an Ft-band amplifier doubler, and a coupler detector for two new frequency multiplier modules. by Mohamed M. Sayed and Giovonnae F. Anderson THE MILLIMETER-WAVE PORTION of the electromagnetic spectrum lies between the microwave and far infrared regions. Generally, millimeter-wave frequencies are between 3Qand 300 GHz wavelengths from 10 to 1 mm . The...
Accessing a Power Meter for Calibration
Several calibration-related features of the HP 8350 synthesized sweep oscillators require an output power measurement The results of these power measurements are used by the HP 8360 to update internal power accuracy tables or to calibrate specified user flatness frequencies The HP 8360 provides two methods of making these power measurements direct HP-IB control of a power meter and an HP-IB query'response protocol. The HP 8360 can control an HP 437B power meter over the HP-IB By removing any...
A toGHz Switched Frequency Doubler
This microcircuit doubler has a passthrough mode for 0.01 to-20-GHz input signals and a doubler mode for 20 to 40 GHz. An integrated RF switch changes modes. Slotline filters reduce spurious outputs to -40 dBc or less. THERE IS SIGNIFICANT DEMAND for microwave swept sources that span very broad frequency ranges such as 0.01 to 40 GHz. Many of the applications require a relatively spurious-free output signal, but this has been a limitation of traditional doubler structures. To meet such...
An Instrument for Testing North American Digital Cellular Radios
The HP 11846A is designed to produce filtered ir 4 DQPSK modulated I and Q baseband signals needed to test digital cellular radios. RAPID GROWTH IN THE DEMAND FOR AMPS Advanced Mobile Phone Service cellular radios in North America has caused saturation in current analog cellular frequency bands. This has spurred the development of a new digital cellular standard that will increase the spectrum efficiency of cellular radios to allow more users to share the same frequency spectrum. The...
Automatic Frequency Span Calibration
The HP 8350 synthesized sweep oscillators use a ock-and-roii method of frequency sweeping Sim-iar to thai used by the HP 8566A spectrum analyzer and the HP 6340 synthesized sweeper see article page 6 The sian frequency of the sweep is synthesized by phase-locking the YlG-tunea osoiiaior YTO o a combination of a sampler loop harmo c and a tow-frequency osc Jator Tns c fference between the sampler harmonc anc the YTO frequency s equal to the frequency of the low-frequency oscillator Th s...
Changing Source Match
A relative power measurement is a measurement of the ratio of two power levels. In calibrating the HP 8360 synthesized sweeper at low power levels a reference power measurement is taken with ihe HP 8360 programmed to an accurately known power level. Then the HP 8360 s internal attenuator is switched to reduce the output power and calibrating power measurements are taken at various power levels An error is introouced because the source match changes as the attenuator is switched An analysis was...