一、Characteristics
The main role of LTCC directional couplers (also known as directional couplers or power dividers) is to transmit signals or energy, so that various devices or systems can work in coordination with each other, so as to pass signals from one device to another to achieve data transmission or communication. In the microwave system, the main function of the coupler is to divide the microwave power into several channels proportionally, so as to achieve power distribution. The LTCC directional coupler has the function of quantitatively absorbing the energy in the transmission line, controlling the power level, extending the power range, and has the advantages of precisely controlling the coupling quantity and high isolation.
LTCC directional coupler has wide frequency range, low standing wave coefficient, high attenuation accuracy, small size, long service life and high temperature resistance. High integration, light weight, good compatibility; It can have the advantages of miniaturization, thin, short and small, and the integrated design features of high elasticity.
Ltcc coupler
二、Electrical Characteristics
| LTCC coupler (also directional coupler) model and parameter table |
Part No
| Frequency(MHz) | Insertion loss(dB) | Coupling quantity(dB) | V.S.W.R | Isolate (dB) | Amplitude balance(dB) | Phase balance (deg) | Power(W) | Size(mm) | SPEC |
| LC65C1500P24-C21 | 12000~1700 | ≤ 0.18 | 3±0.25 | ≤ 1.2 | ≥25 | ±0.25 | 90±2 | 175 | 6.35*5.08*1.9 |  |
| LC1408C2100P44-C15 | 2000~2300 | ≤ 0.15 | 3±0.18 | ≤ 1.15 | ≥25 | ±0.18 | 90±2 | 175 | 14.2*8.9*2.5 | |
| Note: Due to many product models, only some representative models are listed in the table |
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三、Application & attention
LTCC directional couplers are widely used in the field of electronic communication, which effectively reduces the area and volume of microwave passive devices, and is the preferred way to achieve miniaturization and integration of microwave circuits and systems. In use, but pay attention to the grounding end is well grounded, otherwise it will affect out-of-band suppression and flatness indicators, welding temperature is best to use the recommended temperature, not too high, the time can not be too long. If reflow welding is used, the recommended temperature is recommended, and wave soldering is not recommended. Products should be stored in the ambient temperature of -10℃~40℃, relative humidity is not more than 80%, the surrounding environment is not acidic, alkaline and other harmful gases in the warehouse. It is recommended to wipe with alcohol when cleaning.
The company has a variety of package types of LTCC directional couplers (power dividers) for users to choose, flexible design, support customization (input/output form and shape size can be designed according to user requirements). LTCC low-pass filter, LTCC high-pass filter, LTCC bandpass filter, LTCC band-stop filter can be customized. Because the indicators of microwave components are related to each other and sound to each other, the user needs to clearly state the indicator requirements before customization. Once the product is made, it cannot be changed. If there are indicators that exceed the physical limit of the material itself, the best indicators can be achieved through negotiation between the two parties.
