HMC156A

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The HMC156A RF Misc ICs and Modules is an antenna switch module with integrated control, developed by Skyworks Solutions Inc. It is provided in a small, low-cost, surface-mount package and is suitable for a wide range of wireless systems. It features a low insertion loss and a high isolation between the transmitting and receiving antennas.

The HMC156A is designed to provide an integrated antenna switching device for dual-band operation in GSM, TD-SCDMA, WCDMA, CDMA, WiMAX, LTE and Mobile WiMAX systems. It offers a typical insertion loss range of less than 0.5 dB and a typical isolation of up to -60 dB. It also features a wide control range and low control power.

The primary application of the HMC156A is to switch between two or more antennas for effective antenna diversity. It can be used in both single and multi-band systems, switching between the transmitting and receiving antennas, as well as between the multiple bands. This is especially effective in improving overall system performance in high-speed and transmit/receive applications. It can also be used as a switch unit for diversity systems, where multiple antennas are used to reduce fading and enhance coverage.

The working principle of the HMC156A operates on two basic external control signals, the antenna switch control (ASC) signal and the control voltage (VCTL) signal. The ASC signal is the primary control signal, and determines the position of the antenna switch. It can be either high or low, and is typically controlled by a processor. The control voltage signal is the secondary control signal, and is used to reduce power consumption by controlling the voltage applied to the switch. The control voltage can be adjusted to a specific level, depending on the antenna switch position.

The HMC156A can be controlled with logic levels, I2C or SPI, enabling it to operate in variety of wireless systems and applications. It is designed to operate from -40°C to +85°C and is compliant with the RoHS Directive. The module is shielded for EMI / RFI immunity and has a relatively low electromagnetic signature for improved system performance.

In conclusion, the HMC156A RF Misc ICs and Modules is an excellent solution for antenna switching, offering superior performance in terms of insertion loss, isolation and control accuracy. Its small surface-mount package and wide control range make it an ideal choice for a range of wireless applications, including GSM, TD-SCDMA, WCDMA, CDMA, WiMAX, LTE and Mobile WiMAX systems. The device can be easily programmed and controlled by logic, I2C or SPI, enabling it to be used in a variety of products.

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