Wideband direct modulator

4 August 2010 Telecoms, Datacoms, Wireless, IoT

Hittite has introduced a new wideband direct I/Q modulator with VGA which is designed for automotive, broadband, cellular/3G, WiMAX/4G, military and test and measurement equipment applications between 20 and 2800 MHz.

The HMC795LP5E is a low-noise, high-linearity RFIC which is rated from 20 MHz to 2800 MHz with integrated digitally controlled analog variable gain amplifier (AVGA) with digital control features that provide up to 32 dB of linear gain control in 0,5 dB steps. The devce exhibits an output noise floor of -156 dBm/Hz, output P1dB of +11 dBm, output IP3 of +22 dBm and sideband suppression of -53 dBc. The RF output port is differential while the LO input operates from drive levels between -9 and +3 dBm, and can be driven in either differential or single-ended mode.

The high level of integration is achieved with LO feed-through and single sideband rejection, typically better than -50 dBc uncalibrated over the full 31,5 dB dynamic range at the output while operating at a low 120 mA power consumption. The HMC795LP5E integrates a differential I and Q interface for direct up-conversion from baseband digital-to-analog converters operating at up to 400 MHz, plus a wide range of RF amplitude control to allow optimisation of the drive level to follow-on driver stages.

The AVGA offers flexible control options including serial port or parallel port interfaces featuring a built-in 11-bit DAC with linearisation to allow 31,5 dB output power control with 0,5 dB steps from either control port. More demanding applications can access the 11-bit DAC directly via the serial port and achieve 0,1 dB steps over a 20 dB dynamic range.

The HMC795LP5E is housed in a 5 x 5 mm SMT QFN package. The modulator can be used to create virtually any analog or digital modulation format including BPSK, QPSK, 8PSK, OFDM and QAM for base station, access point and customer premise equipment. It is well suited to software defined radio and multiband transmitters, where the up-converter must dynamically alter its modulation format and/or output frequency, depending on local operating conditions.

For more information contact Andrew Hutton, RF Design, +27 (0)21 555 8400, sales@rfdesign.co.za, www.rfdesign.co.za

Further reading:

Wireless connectivity expanded
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Espressif Systems has introduced two new members of its ESP32 wireless SoC family: the ESP32-E22, the company’s first Wi-Fi 6E connectivity chip, and the ESP32-H21, an ultra-low-power Bluetooth LE microcontroller aimed at coin-cell and battery-powered devices.

Read more...

---

Integrated X-band radar front-end module
RF Design Telecoms, Datacoms, Wireless, IoT
Qorvo has introduced an X-band radar front-end solution that enables defence system designers to achieve higher performance without increasing size, weight or prime power.

Read more...

---

Introducing Aurata
CST Electronics Telecoms, Datacoms, Wireless, IoT
Antenova has launched Aurata SR4L112: a compact, high efficiency embedded 4G/LTE antenna engineered for long, narrow PCB designs.

Read more...

---

Multi-constellation GNSS module in a legacy-compatible footprint
Altron Arrow Telecoms, Datacoms, Wireless, IoT
Telit Cinterion has announced the SE869eK2L, a single-frequency L1 GNSS module designed to help device manufacturers upgrade legacy positioning designs with improved performance and cost efficiency, while preserving design continuity.

Read more...

---

Quectel expands 5G portfolio
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Quectel expands 5G portfolio with new Qualcomm- and UNISOC-based modules.

Read more...

---

Compact RTK design: More than just the receiver
iCorp Technologies Editor's Choice Telecoms, Datacoms, Wireless, IoT
In practice, engineers building compact RTK products keep discovering the same thing: the hardest component in the system is no longer the receiver. It is the antenna.

Read more...

---

Microchip advances Space-Grade timing performance
ASIC Design Services Telecoms, Datacoms, Wireless, IoT
Microchip Technology has expanded its atomic clock portfolio with the radiation-tolerant Space CSAC-SA65, a Chip Scale Atomic Clock designed to deliver precise timing for space systems.

Read more...

---

Channel emulator for 6 G and Wi-Fi 7/8
Concilium Technologies Telecoms, Datacoms, Wireless, IoT
With 400 MHz instantaneous bandwidth and support for carrier frequencies up to 23,6 GHz, Vertex 6.0 is the industry’s first channel emulator designed for next generation 6 G and Wi-Fi 7/8 testing.

Read more...

---

Secure, low-power Bluetooth LE SoC
NuVision Electronics Telecoms, Datacoms, Wireless, IoT
Silicon Labs unveils BG2B, its lowest-power Bluetooth LE SoC with industry-leading power efficiency, security, and integration.

Read more...

---

High-isolation RF switch optimised for broadband cable
Telecoms, Datacoms, Wireless, IoT
pSemi Corporation has announced the PE42727 UltraCMOS SPDT RF Switch, a high-isolation solution optimised for next generation broadband cable applications.

Read more...

---