Time-Interleaved ADC Benefits 60-GHz Transceiver
A number of standards have sprung up in the 57-to-64-GHz band, such as IEEE 802.15.3c, IEEE 802.11ad, and WirelessHD. No matter the standard, they all have one common goal: to speed the realization of integrated circuits (ICs) that can support large wireless data transfers at those millimeter-wave frequencies.
Methodology Optimizes Design Of Scalp-Implantable Antennas
In the area of implanted medical devices, antenna-enabled biotelemetry is gaining attention for its potential to overcome the limitations of inductive biotelemetry. Such issues include low data rate, restricted communication range, and sensitivity to inter-coil misalignment.
GaAs Chips Help VSAT Systems
A family of Ka-band GaAs chipsets has been developed by TriQuint Semiconductor for use in very-small-aperture-terminal (VSAT) satellite communications systems. The family includes a variable-gain amplifier, a 1-W power amplifier (PA), a subharmonic frequency upconverter, and a block frequency downconverter.
Portable Tester Scans To 1 GHz
The 3550 digital radio test system enables radio testing from 2 MHz to 1 GHz and is ideal for field testing of analog and digital systems.
Frequency Doubler Extends To 30 GHz
Model XX1010-QT is a GaAs monolithic-microwave-integrated-circuit (MMIC) frequency doubler from M/A-COM Technology Solutions that is well suited for satellite-communications (satcom) and point-to-point communications systems.
Planar Antenna Captures NFC Data
A near-field communications (NFC) antenna enables mobile telephones to read data from a source at distances to 40 mm. The antenna sends and receives clear signals even when installed in close proximity to a battery or metal housing.
BUC Links Ku-band Satcom Systems
Model XTS-40KHE-B1 is a Ku-band block upconverter (BUC) that includes temperature compensation, gain control, harmonic filtering, receive-band filtering, and an output isolator in a compact unit weighing less than 10 lbs; it measures just 11.2 x 4.4 x 54. in.
Module Supports ISM Front Ends
Designed for applications in the 868/900-MHz Industrial-Scientific-Medical (ISM) band, model RFFM6904 is a single-chip front-end module (FEM) ideal for portable equipment.
Switch Channels 14.4 to 15.4 GHz
Model P2T-14D415D4-15-SMT-20W is a driverless high-power single-pole, double-throw (SPDT) switch designed for applications from 14.4 to 15.4 GHz. It exhibits maximum insertion loss of 1.2 dB at room temperature (+25°C).
VCO Tunes From 1210 To 1230 MHz
Model USSP1217-LF is a RoHS-compliant voltage-controlled oscillator (VCO) designed for L-band applications from 1210 to 1230 MHz. It tunes with voltages from 0.5 to 3.0 VDC and tuning linearity of better than 1.1:1.
Metamaterials-Based Approach Promises Satellite Connection
Imagine that a new antenna technology truly made “broadband everywhere” possible. As the most recent spinout from Intellectual Ventures (IV), Kymeta just closed a $12-million funding round to develop and bring to market IV’s Metamaterials Surface Antenna Technology (MSA-T).
Broadcast Services Are Demonstrated Over LTE
Using evolved Multimedia Broadcast Multicast Service (eMBMS) technology, it is possible for Long-Term-Evolution (LTE) network infrastructure to be used for the delivery of broadcast services, such as television. This capability, if utilized, could certainly impact how LTE services are offered.
OCXOs Provide Holdover Timing For Base Stations
For wireless communications that use time-division-duplex (TDD) signaling, it is very difficult to maintain synchronization. In addition to providing real-time services, base stations must maintain accurate relative timing for successful call-signal handoff.
