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, [email protected], www.rfdesign.co.za

Further reading:

Wi-Fi 6 and Bluetooth LE co-processor
Altron Arrow Telecoms, Datacoms, Wireless, IoT
STMicroelectronics has released its ST67W611M1, a low-power Wi-Fi 6 and Bluetooth LE combo co-processor module.

Read more...

---

Improving accuracy of outdoor devices
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
In a real-world environment, accessing a direct satellite signal is not always possible, and it cannot be relied upon as the only solution to provide a device with accurate location at all times.

Read more...

---

New 3dB hybrid couplers
Electrocomp Telecoms, Datacoms, Wireless, IoT
Designed to facilitate the continued evolution of high-frequency wireless systems in various market segments, the new DB0402 3dB 90° hybrid couplers provide repeatable high-frequency performance compatible with automated assembly.

Read more...

---

Next-level Software Defined Radio
IOT Electronics Telecoms, Datacoms, Wireless, IoT
Great Scott Gadgets has announced the HackRF Pro, a powerful evolution of its popular Software Defined Radio (SDR) platform designed for engineers and enthusiasts.

Read more...

---

High-performance Zigbee and BLE module
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
The KCMA32S from Quectel boasts an ARM Cortex-M33 processor with a frequency of up to 80 MHz, and supports Zigbee 3.0, BLE 5.3 and BLE mesh.

Read more...

---

Championing local PCB manufacturing
Master Circuits Telecoms, Datacoms, Wireless, IoT
Master Circuits, founded in 1994 by Peter Frankish in Durban, was born from the vision to meet the growing local demand for quick-turnaround printed circuit boards in South Africa.

Read more...

---

How IoT-driven smart data helps businesses stay ahead
Trinity IoT Telecoms, Datacoms, Wireless, IoT
With around 19 billion IoT devices globally, embedded in everything from machinery to vehicles to consumer products, reliable data is plentiful.

Read more...

---

IoT-optimised LTE Cat 1 bis module
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Quectel’s EG915K-EU is an LTE Cat 1 bis wireless communication module specially designed for M2M and IoT applications.

Read more...

---

Chip provides concurrent dual connectivity
EBV Electrolink Telecoms, Datacoms, Wireless, IoT
The IW693 from NXP is a 2x2 dual-band, highly integrated device that provides concurrent dual Wi-Fi 6E + Wi-Fi 6 and Bluetooth connectivity, supporting four different modes.

Read more...

---

The 6 GHz band radio solution
Altron Arrow Telecoms, Datacoms, Wireless, IoT
Analog Devices’ 16 nm transceiver family offers a highly integrated solution for this new frequency band, featuring low power consumption and high performance.

Read more...

---