一、Characteristics

       The role of Barron is to realize the conversion between the balanced signal and the unbalanced signal. The input and output ports (50Ω) of the antenna of most radio stations are unbalanced. Barron is mainly used in the interface of differential and single-ended signals, impedance matching, and improving the anti-interference ability of the circuit, suppressing high order harmonics, and playing the role of common mode suppression. In different applications, Barron is required to have zero or high isolation. Barron's impedance ratio refers to the ratio of the impedance of the unbalanced port to the impedance of the balanced port, and different loads may require different impedance ratios. Barron also has insertion loss and return loss parameters, which indicate how much energy measured at the port passes through the Barron and how much energy is reflected by the Barron, respectively, and such losses vary with frequency.

      LTCC Barron (also known as balancer, impedance converter) in addition to the advantages of miniaturized integration and higher elasticity of the design features, there are high gain, low insertion loss, anti-electromagnetic interference, anti-power noise, anti-ground noise ability, suppression of even harmonics and other advantages of a variety of impedance conversion series. Product consistency, good sealing, can effectively moisture-proof, further circuit miniaturization and high-density, especially suitable for high-frequency communication components. This type of product generally adopts SMD package. In RF and low-frequency circuits, Barron (also called balancer or impedance converter) is becoming more and more widely used and increasingly important.

LTCC Barron

二、Electrical Characteristics

LTCC Baron (LTCC Balancer, impedance converter) type and parameter table
Part No	Frequency（MHz）	Insertion loss（dB）	Impedance（Ω）	‍Size（mm）	SPEC
LB21H2-1700B33	400 - 3000	≤ 2.5	50：100	2.0 * 1.25 * 0.95
LB21H1-1975B29	950 - 3000	≤ 1.7	75：75	2.0 * 1.25 * 0.95
LB21H4-0915 &1915 B39	869 - 960 / 1805 - 2025	≤ 1.1 /   ≤ 1.8	50：200	2.0 * 1.25 * 0.95
LB21H15-1550B18	950 - 2150	≤ 1.3	75：75	2.0 * 1.25 * 0.95
LB21H2-1550B19	950 - 2150	≤ 1.3	75：150	2.0 * 1.25 * 0.95
LB21H4-1220B11	1200 - 1240	≤ 1.2	50：200	2.0 * 1.25 * 0.95
LB21H4-1403B12	1279 - 1526	≤ 1.0	50：200	2.0 * 1.25 * 0.95
LB21H4-1600B13	1500 - 1700	≤ 0.8	50：200	2.0 * 1.25 * 0.95
LB21H4-2160B14	1980 - 2140	≤ 0.8	50：200	2.0 * 1.25 * 0.95
LB21H1-2450B43	2400 - 2500	≤ 1.0	50：50	2.0 * 1.25 * 0.95
LB21H2-2450B44	2400 - 2500	≤ 1.0	50：100	2.0 * 1.25 * 0.95
LB18H2-2500B35	2300 - 2700	≤ 1.0	50：100	1.6 * 0.8 * 0.95
LB18H2-2500B38	2300 - 2700	≤ 1.1	50：100	1.6 * 0.8 * 0.95
LB21H2-5378B42	4900 - 5800	≤ 1.0	50：100	2.0 * 1.25 * 0.95
Note: Due to many product models, only some representative models are listed in the table

三、Application & attention

        Barron is commonly used in radio stations, baseband video, radar, transmitters, satellites, routers, for mobile communications and data transmission networks and other modern communication systems. In use, but pay attention to the grounding end is well grounded, otherwise it will affect the out-of-band suppression and flatness indicators, welding temperature should not be too high, the time should not be too long, recommended temperature. Do not use wave soldering. 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 can customize LTCC balancer (LTCC Balancer). Users who accept customized LTCC Balancer need to put forward reasonable requirements, and the parameters beyond the physical limit of the material can be negotiated by both parties to achieve the best indicators.