The Editors of Microwaves and RF

The
Editors of Microwaves and RF
Articles
Spectrum-Shortage Outlook Is Grim
According to CTIA-The Wireless Association (www.ctia.org), the US government controls 409.5 MHz of spectrum for commercial wireless services—although not all of that bandwidth is at ideal frequencies. The frequency range best suited for high-speed, commercial wireless-broadband services is between 400 MHz and 3 GHz.
Spectrum-Shortage Outlook Is Grim
According to CTIA-The Wireless Association (www.ctia.org), the US government controls 409.5 MHz of spectrum for commercial wireless services—although not all of that bandwidth is at ideal frequencies. The frequency range best suited for high-speed, commercial wireless-broadband services is between 400 MHz and 3 GHz.
Clock-Divider IC Has Delay Adjustment
Designed for outstanding phase-noise performance, model HMC988LP3E is a clock divider and delay management IC that can handle clock signals as high as 4 GHz, dividing them by ratios of 1, 2, 3, 4, 8, 16, or 32.
Phase Shifter Runs 9 To 11 GHz
Designed for applications from 9 to 11 GHz, model PS-9G11G-3609-A-SFF is an analog phase shifter that can control a phase-shift range of 0 to 360 deg. It uses a phase-shift control voltage from -7.5 to +7.5 VDC.
Diplexer Passes 3.5 and 5.5 GHz
Suitable for combining or separating WiFi and WiMAX signals in the 2.4- and 5-GHz bands, the model BK-28N diplexer has passbands of 2.400 to 3.800 GHz and 5.150 to 5.850 GHz.
Hermetic Isolator Spans 2.2 To 2.3 GHz
Model 2A4NEX is a hermetic high-power microwave isolator designed for use in space applications from 2.2 to 2.3 GHz.
Flat-Panel Antenna Combines Polarizations
The HyperLink HG2414DP-3NP flat-panel antenna is designed for multiple-input, multiple-output (MIMO) point-to-point and point-to-multipoint applications in the 2.4-GHz frequency band.
LDMOS Device Delivers 1 kW
Model PTVA101K02EV is a high-power silicon RF LDMOS field-effect transistor (FET) designed for use in power amplifiers operating in the frequency range from 1030 to 1090 MHz.
GaN Powers 10-W Amplifiers
The NuPower™ line of L- and S-band solid-state power amplifiers is ideal for unmanned aerial vehicles (UAVs) and unmanned aircraft systems (UAS) applications, as well as for broadband telemetry and communications.
Make Sense Of Sensing
When emerging opportunities in the microwave and general electronics market are brought up, sensing is often mentioned. Already, touchscreens and accelerometers have seen vastly increased adoption in mobile phones.
Software Speeds PA Design 1
In RF and microwave engineering, the design and development of power amplifiers (PAs) is something of a black art. In addition to years of focused engineering experience, it demands a suitable collection of test and measurement equipment.
Push-Push VCO Fulfills 60-GHz Transceiver
IEEE Task Group 802.15.3c provides allocation for four bands—each with a bandwidth of 2160 MHz. To prevent an image signal or local-oscillator-1 (LO1) leakage signal from being transmitted in the RF bands—and to enable an image-rejection filter to operate around 60 GHz—a sliding intermediate-frequency (IF) range was chosen for the standard.
LNA Suits WCDMA Base Stations At 1.95 GHz
Numerous base stations elevate the placement of the first low-noise amplifier (LNA) so that it is near the antenna, rather than at the ground units. With this approach, signal conditioning is performed before the signal is transferred over a long cable from the top of the base station to the ground.
60-GHz Circularly Polarized Antenna Employs Artificial Magnetic Conductor
For wireless personal-area networks (WPANs), the 60-GHz unlicensed frequency band offers the hope of multi-gigabit-per-second wireless connectivity for short distances between devices.
60-GHz Circularly Polarized Antenna Employs Artificial Magnetic Conductor
For wireless personal-area networks (WPANs), the 60-GHz unlicensed frequency band offers the hope of multi-gigabit-per-second wireless connectivity for short distances between devices. Impressively, the data rates that are being touted exceed the rates offered by current lower-frequency wireless-local-area-networking (WLAN) technologies by 40 to 100 times.
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